True, because adverbs modify verbs, adjectives, and other adverbs. Hope this helps :)
Answer:
I don't know what you're doing
1+1=3
I don't know what the joke is
What are some of the tires Ray would be able to use. Then break it down to what tire would be probably be the most durable, the most long lasting, which ones are safer, and which one have the best tread. Then you would be able to make your decision.