<span>C) :
A colon here is right to set up the quote from the introduction in the sentence. The lead in shows that the writer is about to provide a specific example, not a quote that continues the flow of the sentence. A colon allows the quote to stand alone from the rest of the sentence as an example.</span>
I think it's true but I'm not 100% sure
C. bicycling to build leg strength. It is the most general activity among the
four choices. Although it says to build
leg strength it is not so specific for what activity it will be used for. The other choices were more specific in their
goals.