The correct answer is: A. who scores the maximum points.
The sentence is in the future tense, so the verb “score” should also be in the future tense. The other options are incorrect because they use the present tense or the past tense.
Option B: who the maximum points scores is incorrect because it uses the present tense. The sentence is about something that will happen in the future, so the verb should be in the future tense.
Option C: who would score the maximum points is incorrect because it uses the past tense. The sentence is about something that will happen in the future, so the verb should be in the future tense.
Option D: No improvement is incorrect because the sentence is not grammatically correct. The verb “score” should be in the future tense.
Here is a corrected version of the sentence: The man who will score the maximum points will carry the trophy.