Question

Which revision changes the sentence to draw attention to the object of the action rather than the people or things performing the action?

Answer 1

D.The "Space race" was a Cold War competition by scientist

Answer 2

Answer;
The "space race" was a Cold War competition by scientist
Explanation; 
The revision that could change the sentence and draw the attention to the object rather than the people performing the action is the “space race” was a Cold War competition by scientist. Here, “space race” which was the object from the original sentence was given emphasis