Do you want to come along with Jane?( ).She is a bit annoyin

Do you want to come along with Jane?( ).She is a bit annoying sometimes.
Do you want to come along with Jane?
( ).She is a bit annoying sometimes.
A Not really B.Not exactly C.Not a little D.NO problem.
老师给的答案是选A,我很疑惑B为什么不选?
请把句子翻译下并告诉我为什么选A