Correct Answer: A
Explanation:
Option A : Correct. Unless the answer to this question were yes rather than no, the switch to LED arrays would not help minimize Traverse's yearly maintenance costs. So it is essential to know the answer to this question in order to determine whether switching to LED would help.
Option B : The existence of another possible alternative to incandescent lights does not have any bearing on the question of whether switching from incandescent lights to LED would help.
Option C : The source from which Overtone acquires its lights, be they incandescent or LED, is unimportant.
Option D : Increasing the number of traffic signalling Travertonwouldprobably increase the city's yearly maintenance costs, but it would do so regardless of whether those lights use LEDs or incandescent bulbs.
Option E : Since the goal of switching to LED arrays is to help minimize yearly expenditures on maintenance, a potential one-time cost—that of training workers to convert the existing fixtures—is not relevant. Further, it is not necessarily the case that the crews that currently replace the incandescent bulbs would be the ones converting the existing fixtures-and even if they were, the account of the plan states that conversion costs would be minimal.
The correct answer is A.