Can you please list the paragraph in question?
The best possible answer would seem to be C.
Answer:
Yes it is a complex sentence
Explanation:
because a complex sentence contains an independent and atleast one dependent clause here after the rain ended is a dependent clause where, the sky became blue is an independent clause as if we only write The sky became blue it can be understood but if we write After the rain ended only nothing is clear and this cannot be understood. A complex sentence can be separated by comma.
You should speak in a nice strong voice. be confident!
