We should treat our friends correctly in this topic. According to the textbook knowledge, we can see that "the only way to make friends is to be your own friends first." Explain that making friends is mutual. To make our classmates our friends, we should treat our classmates as friends first, so A is the right choice. Option b "self-centered" can't build a long-term friendship; C option "buddy loyalty" is not a true friend; Option D needs to make friends actively, excluding BCD. ..
So choose a.