Which statement was one of the reasons for the successful invasion of northern india by muslim rulers in the late 1100s?
hindu princes followed the principle of nonviolence and did not oppose the invading armles.
muslim invaders came to india on the pretext of establishing trade relations and staged coups from within before taking control of northern india.
muslim invaders established alliances with sikh princes, and their combined military might resulted in the successful invasion of northern india.
hindu princes wasted resources battling one another instead of uniting against a common enemy.

Hindu princes wasted resources battling one another instead of uniting against a common enemy

Explanation:

In the period when the Mughal Empire was on the rise and started to move toward the Indian subcontinent in order to conquer it, the Hindu princes were fighting against one another. There was not a large and unified Hindu nations, but instead there were multiple smaller ones that were constantly wasting their resources on fighting with one another. The Mughals used this situation and managed to conquer the northern part of India without any particular problem. This led to the establishment of the first Muslim Empire on Indian soil, and that led to Islamization of lot of people in that area over the course of several centuries.

it the big letter b heart my answer

answer:   migrations were important in the neolithic period. "two major migrations passing through southeastern europe were confirmed by the means of archaeo-genetic studies."

the first migration was the early neolithic period -- 6,000 before common era (bce) -- when the first farmers, from anatolia -- asia minor -- spread through europe. the second migration occurred during the early bronze age (3,000-2,500 bce) when the so-called "steppe population," from the eurasian steppe, replaced much of northern europe's previous population.

the first farmers of northern and western europe passed through southeastern europe with limited hunter-gatherer genetic admixture, which occurs when two or more previously isolated populations begin interbreeding. however, some groups that remained mixed extensively -- without the male-biased, hunter-gatherer admixture that prevailed later in the north and west, according to latest discoveries. southeastern europe continued to be a nexus between east and west, with intermittent genetic contact with the steppe people up to 2,000 years before the migrations that replaced much of northern europe's population.

"in some places, hunter-gatherers and incoming farmers seem to have mixed very quickly," says iain mathieson, a geneticist at the university of pennsylvania, who was first author of the paper. "but, mostly, the two groups remained isolated, at least for the first few hundred years. these hunter-gatherers had been living there for thousands of years, and it must have been quite a shock to have these new people show up -- with a completely different lifestyle and appearance."