Based of the research I just made about the CLEP exam, D. seems like the appropriate answer.
What is this I can understand well hope everything goes well
Answer: Follow your dreams
Explanation: (Google Search )
There are no age restrictions for the NASA Astronaut Corps. Astronaut candidates have ranged between the ages of 26 and 46, with the average age being 34. Candidates must be U.S. citizens to apply for the program. There are three broad categories of qualifications: education, work experience, and medical