Saying that water has a specific heat TWICE as large as that of ice means that it takes twice as much energy to raise 1 gram of water 1 degree Celcius as it does to do the same to 1 gram of ice. This answer is based STRICTLY on the definition of specific heat. Once you have figured out how the definition applies to the problem, then you must be careful to select the correct answer. The only fit is answer (c).