How did Rockefeller use horizontal integration? A.
by controlling all aspects of the production process
B.
by using huge profits to eliminate his competitors
C.
by getting an exclusive government contract
D.
by buying out all the competing oil companies

I think its D but im not all the way sure

Explanation:

Rockefeller used horizontal integration to build the Standard Oil empire by making agreements with railroads. Rockefeller's business was big enough that he could negotiate favorable rates for transporting oil because he was transporting a lot of oil and the railroads wanted his business

answer; i believe its (cpr);

freedom of speech is also protected by the 1 amendment.

explanation:

here is pretty much what the 1st amendment says:

congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the government for a redress of grievances.