A and B Both Filipinos Are Married

A and B both Filipinos are married. A was convicted of the crime of murder. They sought your advice whether they can adopt C, a relative by consanguinity of B. What is your advice?

A) They can adopt C, but must jointly adopt.
B) They cannot adopt C because A is disqualified because of conviction of a crime invoking moral turpitude.
C) Since A cannot adopt, B can adopt C alone.
D) They can jointly adopt C, but prove that it will redound to the best interest of C.