Academic research usually includes steps to ensure that A)interviews are used
B)validity of sources is verified
C)variety of media is included
D)video is used as a source

C.

Explanation:

that is my answer

tama po yan ha

b. failure at least that one seems the most negative out of all of the answers provided pls correct me if i'm wrong. : ))

answer; (d) i believe the best answer is ; ///people said that man could not fly, but in 1903, orville and wilbur wright made the first sustained powered flight in a heavier- than-air machine;