This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to prepare vermicompost
Pick a spot in your house to place the worm bin.
The best spots for worm bins keep a consistent temperature and moisture level. Avoid placing it near a heater, oven, air conditioner, or vent.

Select from the following.
a). Although worm bins usually don't produce much smell, you may want to keep it out of the main living areas of your home. The ideal temperature for the worm bin is 55 to 75 degrees fahrenheit, or 12.;
b). Remember the most common places to place a worm bin include under the refrigerator, in a garage, under the bathtub, or at the farthest corner of the room from what's in your living space. The best place to place a worm bin is in a crawl space.;
c). Do not place it close to open windows. A draft from a heater or open window might make the worm bin dangerous.;
d). Place the bin close to doors, chimneys, or other means of escape. Place the bin in a heat-safe spot.;
The answer is:
a).