please help with Accounting....thank you sooo much

Glacier Corporation discovered these errors in August of Year 3: Assume all current items are two months in duration. Net Income for Year 2 was exist18,000. Assume all errors are discovered in August of Year #3. The Year #2 books are open. The net effect on Year #2 Beginning Retained Earnings caused by the August Year #3 correcting journal entries was: Select one: a. exist4, 500 b. exist3, 700 c. exist2, 700 d. exist2, 500 e. exist2, 300