urgent!!!

Why the ans is A but not E??

3. Which of the following statements best describes the relationship between net income for the period and the ending balance in retained earnings? A) Net income for the period increases the ending balance of retained earnings. B) Retained earnings at the end of the period increase the amount of net income. C) Net income for the period reduces the ending balance of retained earnings. D) Net income for the period has no effect on the ending balance of retained earnings. E) None of the above is the correct order