Consider the following casual claim: the lawn mower started up just fine last week, and now it won't start at all. Could the fact that I let it stand...

Consider the following casual claim: the lawn mower started up just fine last week, and now it won't start at all. Could the fact that I let it stand out in the rain have something to do with it?

The cause is:

A) the lawn mower started up just fine last week

B) now the lawn mower won't start all all

C) letting the lawnmower stand out in the rain

D) none

I am undecided between the answers B and C. I would think it is C, but from a previous quiz, I don't think it is. Please explain! thank you in advance!