I think the answer is B or D but I don’t know which one to choose because I feel like they both could be right. What is the universal theme of this passage?

José and Amador were best friends and did everything together in
their small town of Cosalá, Mexico. After taking an art class together,
both boys became interested in painting. They'd spend long hours in
the shed on Amador's farm, painting and looking at art books. They
dreamed of attending the School of Fine Arts in San Miguel de Allende
upon graduation. They made a pact that one wouldn't leave the other,
and, as luck would have it, both boys gained admission to the school.
But the summer before they were to begin art school, Amador's father
badly hurt his back, and Amador knew he had to stay and take over the
farm. Amador told José to go on without him; José agonized over his
decision, but he went. In San Miguel de Allende, Jose's work suffered.
He couldn't translate the emotions he was feeling onto the canvas, so
he either ended up with half-finished work or he simply didn't paint at
all. Instead, he stayed up all night looking at the farm pictures Amador
posted on social media sites, wondering if his best friend still painted. He wanted to call Amador so badly, but he just couldn't bring himself
to do it

A. Guilt can sometimes be an obstacle to achieving success.
B. Friends will always be important no matter how far away they are.
C. Sometimes you have to lose everything to learn what's really
important
D. Letting go of the past is an important part of growing up.