Explanation: When resistors are connected in series, their individual power dissipation capabilities add together to determine the total power dissipation capability of the combination. Each 10-watt resistor can independently dissipate up to 10 watts of power as heat without being damaged. Connecting them in series means that both resistors share the same current. If the current through the circuit causes one resistor to reach its maximum 10-watt dissipation limit, the other identical resistor, also carrying the same current, will also be dissipating 10 watts. Therefore, the total maximum power the series combination can safely dissipate is the sum of their individual ratings: 10 watts + 10 watts = 20 watts. Options B and C are incorrect because they suggest a reduction or no change in total power handling, which contradicts the principle of combining individual component capabilities.