The first commercially available frozen vegetable was spinach or peas.
yes
No, unless it is commercially packaged (i.e. canned).
yes u can
Commercially canned corn should last up to three years.
3.0
Lettuce
lettuce
Lettuce
I would say fresh vegetables, but it depends on the source / nature of the vegetable and other canned items
Vegetable soup can be homemade, with fresh, frozen, or canned vegetables. Or, it can be bought pre-made in cans at a grocery store.
I'm not positive, but I've never seen canned or frozen cucumbers:)