Question

Which sentence uses appropriate punctuation?

A. 

Helen arrived unannounced when the house was a mess and we weren't ready for visitors.

B. 

Helen arrived unannounced. When the house was a mess and we weren't ready for visitors.

C. 

Helen arrived unannounced, when the house was a mess, and we weren't ready for visitors.​

Answer 1

c because it uses commas in the correct places.