The meanings of “不错 (búcuò)”

The correct answer is

B
Translation
              Wǒ de érzi zhè cì kǎoshì zěnmeyàng? Mother:我  的 儿子  这 次  考试     怎么样? How was my son’s examination?
Tā de chéngji hěn búcuò. Teacher:他 的   成绩     很  不 错。 He did very well.
Explanation:

This test aims to …