Sentence Correction (SC) | QOTD: In contrast to the injury rates

My opinion: C -As per the below analysis (Awaiting OA)

Also, I have a question forGMATNinja , Is the usage -injury rates "of" supposedly dangerous activities - correct?
Shouldn't it be -injury rates "in" supposedly dangerous activities?

Example: We always say that "The rate of injury in cycling is greater than that in swimming quot; than that "The rate of injury of cycling is greater than that of swimming quot;.

The rate of SOMETHING is greater/lesser than the rate of
...

---