The body of the message should state that you are not certain if you meet the full 4 year social studies requirements. Note that you have listed what you believe to be your social studies courses at the bottom of the email if they might kindly be willing to review those.
Also in the body of the message, ask if you could meet the requirement with a summer course at a local community college (check first to make sure those are available) or via an online course if the courses you listed don’t meet the requirements.