During the cold war, scientists competed in the "space race."

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

a. the "space race" by competing scientists occurred during the cold war.
b. during the cold war, scientists led the "space race" competition.
c. during the cold war "space race", scientists competed.
d. the "space race" was a cold war competition by scientist.

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).

sorry, i just really need points. and to this question, maybe i know the answer. but i have no time now. d