Designed to withstand extreme temperatures, _________
Which choice completes the text so that it conforms to the conventions of Standard English?
the engineers tested the rover in the desert.
the desert was the testing ground for the rover.
the rover was tested by engineers in the desert.
testing the rover in the desert was the engineers' priority.
Correct Answer: C
Choice C is the best answer. The introductory phrase "Designed to withstand extreme temperatures" describes a machine or object. "The rover" is the correct subject.
Choice A is incorrect because "the engineers" were not designed to withstand extreme temperatures. Choice B is incorrect because "the desert" was not designed for this purpose in this context. Choice D is incorrect because "testing" is an action, not the designed object.