What is the difference:between o(log n) and o(log n^2),where

What is the difference:between o(log n) and o(log n^2),where both logarithms have base 2What is the difference:between o(log n) and o(log n^2),where both logarithms(对数) have base 2 ______ .a.o(log n^2) is bigger b.o(log n) is bigger c.no difference这个题目怎么选,最好在翻译出来.