Which dividend option allows a policyowner to use the dividend to pay all or part of the next premium due?

The correct answer is the Reduction of premium dividend option. This option allows policyowners to utilize their dividends to directly reduce the amount they need to pay on their next premium, either entirely or partially. By applying their dividends in this way, policyowners can effectively lower their out-of-pocket costs for maintaining their policy.

In contrast, the accumulation at interest option would typically involve the dividends being accumulated over time and earning interest rather than being applied to premiums. The cash dividend option involves receiving the dividends in cash, which would not assist in paying premiums directly. Lastly, the paid-up additions option allows dividends to be used to purchase additional coverage, which also does not serve the purpose of directly reducing the current premium payment. Each of these other options functions differently and does not provide the immediate benefit of reducing premium costs as the reduction of premium option does.