"That's just how people are, a family had two children. One kid is 2 years older, He was better academically and is well rounded, and behaved whereas for the second child. They weren't failing but nothing extraordinary either, at the house they are slackers and just lay around all day. But they both have the same set of rules. Perhaps one parent is more hardworking and the other parent just does minimum or only puts in just enough effort to get the job done."
I believe the answer would be B. Suspension of disbelief.
Practicing a lot and getting help from teachers or peers