Single/multi-choice problem: Which of the following solutions is better for the following goal:
To make a sponge last longer by killing the germs in it.

Choices:
A). Clean the sponge in the microwave. Make sure the sponge is wet and microwave on high for one minute to kill bacteria..
B). Clean the sponge in the microwave. Make sure the sponge is dry and microwave on high for one hour to kill bacteria..
A).