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

How to tell if something's spoiled
Look for soggy edges.
Leafy vegetables will become soggy and/or slimy when they are spoiled. If left for too long, they will begin to turn brown and develop a slimy coating.

Choices:
[I] Add a handful of grated carrots or squash to each bag of spoiled canned goods. Large clumps that crunch easily will indicate spoiled kiwi or christmas squash.
[II] Discard any leafy vegetables that look like this, as they are inevitably spoiled. You will also notice obvious signs of spoilage in carrots if they are softer and a paler orange color than before.
[III] See if there is leaves on any leafy vegetables. Just because a vegetable has a few leaves on it doesn't mean it's spoiled.
[IV] Fresh food will also become soggy and possibly mold. Shop for fresh food from local farmers' markets.
The answer is:
[II]