Which word or words and punctuation best corrects any errors in the sentence?

It's too rainy to have our picnic however we could go to the movies.

A. picnic, however

B. picnic, however,

C. picnic; however,

D. picnic; however

C. Picnic; however,

Is the best

I would say C picnic; however,

The reason why C is the right choice is because when you have two complete sentences that has a connector word like however you are supposed to have a semicolon before the connector word and then a comma that follows the connector word. That is the easiest way to explain the complicated rule. Good luck.