On a ford assembly line, each worker? a. moved from station to station. b. was responsible for several different tasks. c. performed the same task over and over. d. built at least one car each day

When Ford created assembly lines, it helped make the process of producing automobiles more efficient and quicker. Meaning, more cars to build and sell. It cannot be A., since when workers are surrounding assembly lines, they stick to their one job they've been assigned to. And just repeat that, over and over. So, keeping that in mind, we can easily cancel out B and D.
Answer Remaining: C!

C. performed the same task over and over. is the asnswer