What did john d. rockefeller create in order to monopolize the oil industry?

A trust, is the right answer.

Explanation:

John Davison Rockefeller Sr. was a business magnate and humanitarian from America. He is generally regarded as the wealthiest American of all ages and the wealthiest individual in modern records. In the year 1870, he founded the Standard Oil Company. However, in an attempt to create a monopoly he created a trust.

this defines the ability for a flex item to grow if necessary. it accepts a unitless value that serves as a proportion. it dictates what amount of the available space inside the flex container the item should take up.

give brainlest

the main reason that the constitution did not proclaim all men to be free and equal is because of the issue of slavery.