When Susan Harter asks, "What are you like as a person?," only a 10-year-old might answer:

a. "I am one of the best readers in my class, but I sometimes have trouble with long division."

b. "My favorite color is green."

c. "I'm always nice to everyone."

d. "I have long, straight hair."

Option C

Explanation:

Option A is filled with grammars that possibly a 10 years old might not say all that.

Option B. This answer does not relate to the question above, the 10 year old was not asked what he/she favorite color.

Option C. Is the best option as it generally speaks of what the question asked. A 10 years old can also answer this question in this same manner

Option D. The question didn't ask how her hair was, a 10 years is old enough to differentiate questions.

Option C is the best answer a 10 years old can say to reply the question asked.