The answer to; Which sentence has more than one independent clauses?
A. 
He is the boy who helped me in my assignment.
B. 
I will go there after you come home.
C. 
She asked me to go out, so I did.
D. 
Because he was ill, he stayed home from school.
E. 
After they finished eating, I did the dishes.
Is most likely C
Explanation: The formal sentence is 
She asked me to go out for dinner, so I agreed.
Hope it helps :) and sorry if I’m wrong.