Effective, it supports the claim clearly and logically
it is an adverb clause because enjoyed is acting like a verb
20 mph in general but there have been know to be expectations <span />
You would maybe interview more reliable sources like the school lunch lady’s or principal. Then ask the kids what they think about the situation. Once you get enough information then write about it. You might not get the information from the lunch lady’s cause they don’t want to admit it
