 <translate> (6n^2 + 6n) = 6n(n + 1), which is divisible by both 6 and 12, since n(n+1) is always even.
Thus, the answer is (B). <yor> (6n^2 + 6n) = 6n(n + 1), èyí tí a lè pín sí 6 àti 12, níwọ̀n bí n(n+1) ti máa ń jẹ́ paapa. Nítorí náà, ìdáhùn náà ni (B). 