Well, to give you some inspiration for what to write I can give you reasons I would think you’d want to continue going 2-3 days.
The reasons why 2-3 days is better is because it is more efficient. It alleviates the stress of a 5 day school week, with loads of homework. With 2-3 days you can take more time to narrow your focus, learn and absorb the information taught and you’re able to get your homework done without as much stress, because you have more time to do so. Hope this helps!
The answer you are looking for is B.
C because "the flow" of the sentence is correct. It is not too complex. Its not A because A "are the cost of" is to complex. Its not B because the use of "Noisily" in the sentence should be placed at the end, its a wrong use of juxtaposition.
