<Option(A) is correct
Option A : Correct. If the answer to this question were yes, the plan would probably not achieve its aim of increasing market share. If the answer were no, the plan would have a good chance of succeeding.
Option B : Since there is no information about the effectiveness of the automaker's current advertising, it would not be useful to know whether the same advertising agency will produce the ads publicizing the discount.
Option C : Knowing whether some models will be more deeply discounted than others might help in assessing which of the automaker's models will sell best, butitwould not help in assessing the overallchance of the automaker increasing its market share.
Option D : The discounts the automaker plans to offer willcut intoprofits, according to the information given, so the question of whether the automaker can maintain profit margins while the discounts are in effect has already been answered.
Option E : While it might be useful to the automaker to know about alternative strategies, such knowledge does not help in assessing the likelihood that theplan under discussion will achieve its aim.
The correct answer is A.