Private ownership allows people to decide how they will use their property, as long as
a. their property is put to productive use.
b. they do not invade or damage the property of others.
c. they get permission from government officials who can be counted on to direct the use of property into activities that promote the general welfare.
d. they do not derive personal gain from the use of their property.

Option B “Private ownership allows people to decide how they will use their property, as long as they do not invade or damage the property of others”.  

The premise of personal property and that freedom to use the property in any ways the owner decides, is grounded on the respect for other’s property as well, based on the Non-aggression principle (fundamental in the Libertarianism philosophy).

this is a pretty broad question and can be a pretty lengthy answer. since 1900, women have gained a lot more rights and have become active in the workforce. with women being in the workforce, men play a larger role in family life. many family tasks are shared between men and women, whereas, women used to be the sole family caretakers.

that should get you started at least.