The correct option is B make out
The context refers to not understanding someone due to noise. Option A to "make out" means to be able to hear, read or see something. Thus, "to hardly make out" indicates not being able to understand or hear.
To "make for" (something) is to move towards that.
To "make up" is to reconcile with someone after a fight.
To "make off" (with something) is to abscond with it.
Thus, option A is the correct answer.