Question #N41

The research team found that the type of exercise people prefer, whether it’s vigorous or more moderate, influences the amount of sleep they need.  For example, the group who prefers vigorous exercise needs an average of 7 hours of sleep, while those who prefer moderate exercise tend to need 8.  This finding suggests that, when designing sleep-tracking devices for athletes,  ______ taking into account the type of training regimen athletes are following.

Which choice completes the text so that it conforms to the conventions of Standard English?
A. it would be most efficient for the devices to
B. the devices should
C. the devices are to
D. the devices ought to

Correct Answer is: B

The most logical way to complete this sentence is to use a finite verb in the main clause. Of the four choices, only “the devices should” provides a finite verb (should) that can function as the main verb of the clause. Choice A is incorrect because the phrase "it would be most efficient for the devices to" is an infinitive phrase that cannot function as the main verb of the clause. Choice C is incorrect because the phrase "the devices are to" is an infinitive phrase that cannot function as the main verb of the clause. Choice D is incorrect because the phrase "the devices ought to" is an infinitive phrase that cannot function as the main verb of the clause.