D. felt because Jermaine is the subject completing the action, and Jermaine is a singular noun and therefor needs a singular verb, felt.
One year ago isn’t too old. Since the person mentioned is a dietitian, the information should be expert level and therefore credible. Website that end in .edu can be reliable, but it is still safe to see if the author of the article uses credible evidence.
D I am pretty sure but I didn't read the book
The park is a valuable natural resource. The park is near a gold mine in which trees grow.