Why are you laughing so hard?
________ the jokes he's been telling
a) because of
b) in light of
c) as a result
d) Due to
I think both a and d will do but the answer is d
They all have a similar meaning. c needs to be as a result of.
The 'answer' may be D because that line begins with a CAPITAL letter which is needed at the begining of the sentence.