All of the following are benefits to getting involved with activities outside of school except

I am not sure but I think the answer is b

A disadvantage of getting involved in activities outside the school can be lack of time to other important activities.

Explanation:

For example, the time used for others activities, can be used to make homeworks, study, spent time with the family and friend, sleep the recommended amount of time.

But it's important to have a balance in the use of time a take profit of every moment, balancing our likes with our responsibilities.