I need help on this question, quick. Thank you!

Cash of $$100$ received at the time the service was performed was journalized and posted as a debit to Cash $$100$ and a credit to Accounts Receivable $$100.$ Assuming the incorrect entry is not reversed, the correcting entry is:

a$.$ debit Service Revenue $$100$ and credit Accounts Receivable $$100.$

b$.$ debit Accounts Receivable $$100$ and credit Service Revenue $$100.$

c$.$ debit Cash $$100$ and credit Service Revenue $$100.$

d$.$ debit Accounts Receivable $$100$ and credit Cash $$100.$