71. Which choice offers the clearest and most precise information about how the operation of factory machines changed as a result of McCoy’s innovations?

Answer and Explanation

Your Answer is

Correct Answer is C

Explanation

The question stem asks to choose "The clearest and most accurate information reflects the change in the operation of factory machinery because of McCoy's invention." The previous article pointed out that because of McCoy's invention, the machine can work longer. Consistent with item C.