Hey i NEED help, i checked every question like this, none have the answer. not even the VERIFIED answers gave the answer. ill give 35 points, friend request, and everything else and i will owe whoever answers first and accurate. pls i need help!

What was the result when Standard Oil cut costs to be more efficient and began to build its own barrels, pipelines, warehouses, and tank cars?

A) Other businesses began buying up refineries and creating more competition.

B) It went out of business.

C) The price of oil went up.

D) It could produce and distribute oil products at the lowest prices.
PLS HELP