Single/multi-choice problem: Which of the following solutions is better for the following goal:
easily clean a microwave

OPT:
a). put baking soda and vinegar in a cup of hot water, run for twenty minutes, wipe down with papertowels soaked in cooking spray..
b). pour lemon juice in a cup of water, run for seveal minutes, let cool, and wipe down the inside..
b).