Cho

Câu hỏi: Cho $0<a<1<b$. Tích phân $I=\underset{a}{\overset{b}{}}\left|x^2-x\right|dx$ bằng

A. $\underset{a}{\overset{1}{}}\left(x^2-x\right)dx+\underset{1}{\overset{b}{}}\left(x^2-x\right)dx$

B. $-\underset{a}{\overset{1}{}}\left(x^2-x\right)dx+\underset{1}{\overset{b}{}}\left(x^2-x\right)dx$.

C. $\underset{a}{\overset{1}{}}\left(x^2-x\right)dx-\underset{1}{\overset{b}{}}\left(x^2-x\right)dx$.

D. $-\underset{a}{\overset{1}{}}\left(x^2-x\right)dx-\underset{1}{\overset{b}{}}\left(x^2-x\right)dx$.