Choose the correct sentence.（）

A.I didn't know which job I wanted I was too confused to decide.

B.I didn't know which job I wanted， so I was too confused to decide.

C.I didn't know which job I wanted， I was too confused to decide.

D.I didn't know which job I wanted， so， I was too confused to decide.

正确答案：I didn't know which job I wanted， so I was too confused to decide.