Choose the correct sentence.（）

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.