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

How to get rid of moths
Know the signs.
If you've seen a moth or two fluttering around but aren't sure if you have an all-out infestation, look for these signs :
Tiny holes in your sweaters or other items of clothing. If you see holes in one sweater, you'll probably find more.

Options: a). Spots around telephone poles or interior doorways. Near stairs, walkways or even in tall bookcases.. b). Check all of your clothes made with wool, feathers, fur, and silk. Clothing that looks dusty or discolored, or has a musty smell.. c). On each sweater you take, look in the holes for small amounts of moth or moths. Moths will stick their antennae in the holes.. d). Moths appear to appear in warm, sunny areas that don't receive much direct sunlight. They may scatter decorations around your home..
The answer is:
b).