Question

For those who ____6____ it, the desert can be a beautiful place.

• A. studying
• B. studied
• C. have studied
• D. had studied

Answer 1

The correct option is C have studied

Options D and B are clearly incorrect as they are in the form of past perfect and simple past respectively. Whereas the requirement of the question is to fill the blank with the form of present tense.

Option A is wrong format of present continuous tense. As it lacks the appropriate verb 'are'. Therefore Option A is incorrect.

Therefore Option C is the correct answer. It is in the form of present perfect and expresses an action which started in the past and continued up till now.