Look at the underlined part of each sentence. Below each sentence are given three possible substitutions for the underlined part. If one of them (A), (B) or (C) is better than the underlined part, indicate your response against the corresponding letter (A), (B) or (C). If none of the substitutions improves the sentence, indicate (D) as your response. Thus, a “No improvement” response will be signified by the letter (D).
Go north-east across the mountains till you `ul("will reach")` an island.

Options

A. reached
B. reach
C. have reached
D. No improvement