I almost fell for "marvel <- c(characters, movies, releaseyear) but then thougt "c for concatenate" and picked "data.frame" instead of "c" (the other two options are so obviously wrong). 

I thought it was a donkey, not...

I try to avoid have anything that needs quoting to be a valid name, and except in extremely rare circumstances (eg something used as a name suddenly becomes a reserved...

It's a bit of an easy question, it would have been a bit, harder if it had escaped \ in one of the red herrings. As it stands, if one...