The Cumulative Feature of Preferred Stock Means

The cumulative feature of preferred stock means

A) an unpaid dividend in one year accumulates and must be paid in the future before any dividend can be paid on common stock.
B) any unused votes accumulate to future periods where they can then be exercised.
C) investors choose not to receive a dividend but rather let them accumulate.
D) that the stock's issuer must accumulate funds in a sinking account.