Write the next sentence in the following story.

How to apply window decals
Determine if the conditions are right.
You should only apply decals when the weather is mild. Don't try to apply decals when it is extremely cold or hot.

Options:
a). For example, it's best to stick to weather conditions above 85 f (21 c). Place a drop of decals in the lower corner of your window..
b). Decals are especially prone to getting damaged in extreme conditions. Assess the surfaces you want the surface to be painted..
c). Temperatures between 50-70 f (10-21 c) are ideal. If you are placing decals outdoors, make sure it is not raining or windy..
d). The cold temperature can damage the components that hold the decals together, and windows cannot collect snow. The decals need to be applied after the sun sets, preferably after it has died down... The answer should be
c).