Read the paragraph.

Earlier in the day, Martin had asked his parents if he could have a puppy. While eating dinner, his mom and dad talked about whether he was ready. Martin’s mom said that he was very mature, and his dad noted that Martin always fulfilled his responsibilities. Happily, Martin’s parents agreed to take him to an animal shelter next Saturday to look for a puppy to adopt.

What does the word “mature” and the phrase “fulfilled his responsibilities” suggest about Martin?

A. He takes good care of his pets.

B. He has earned his parents’ trust.

C. He is no longer a child.

D. He does not make mistakes.