How did vertical integration the carnegie steel business?

it reduced the costs along the supply chain, from mining to transportation to manufacturing.
it gave the company a monopoly on the industry because it eventually owned its competitors.
it assigned one worker to a job, which reduce wasted time and speed manufacturing.
it provided quick and easy access to transportation methods, such as canals, rivers, and railways.

"Vertical integration helped the Carnegie Steel business because it reduced costs along the supply chain from mining and transportation to manufacturing. Carnegie bought out coal fields, iron mines and railroad lines to ensure that he could control the raw materials and transportation lines."

- Another Brainlier (not my answer, but I do think this will help you. Credit to the sources.)

answer: option a.

step-by-step explanation:

you know that the quadrilateral opqr ( a four sided figure) is inscribed in circle. this means that all its vertices are on the circle.

then, by definition, the opposite angles of the quadrilateral are supplementary, this means that the sum of their measures is 180 degrees.

you can observe in the figure that the angles ∠opq   and the angle ∠orq   are opposite, therefore:

then, can be used to d to calculate the measure of ∠opq

idk

step-by-step explanation: