Fresh tomato is a better source of vitamin C than canned tomatoes. Why?

The best source of vitamin C is

Main source of vitamin C is

The best source of vitamin C is :

The best source of vitamin C is :

Give reasons for the following: (i) Proteins such as insulin used as drugs cannot be taken by mouth but must be injected. (ii) Fresh tomatoes are a better source of vitamin C than those stored for some time.

Fresh tomatoes are a better source of vitamin C than those which have been stored for sometime. Why?