The second alternative is correct (B).
Thinking about the advantages and disadvantages can help a student make a decision.
Every choice involves at least two alternatives. A pragmatic student will make the choice that suits him best, so it is necessary to evaluate the potential benefits and possible spells that can happen. Is the chance for success greater? And if it goes wrong, the damage is great? Is there remediation?
These are some questions to think about when making a decision.