I believe it is rooms. but I won't be surprised if I'm wrong
The correctly punctuated sentence is A. Does your University offer Chinese languages?
Answer:
Paul Revere's friend will send a secret signal to inform him of the British army's plan.
'Exert' means to apply force on influence over something else, this can be in a negative or positive way. In this quotation, it means that language, if used correctly, has the ability to express a 'hidden power'. It's also worth mentioning that the simile is relevant as the moon has an influence on the level of tides on Earth.