Read these lines from "Playing Robinson Crusoe." HELP ME PLEASE!!!

But Binkie will play whatever I choose,
And he is my true First Friend.

Why does Kipling refer to Binkie as the speaker's "true First Friend"?

Answers:

A. to show that the speaker has a connection with the dog

B. to indicate that Binkie is a more agreeable pet

C. to explain that Binkie is more playful than the cat

D. to indicate that Binkie is the first dog the speaker has ever had