A: Here, "well" refers to a physical structure (a source of water). This makes "well" a noun.

B: In this sentence, "well" is part of the phrasal verb "well up," meaning to rise or swell (like tears rising in the eyes). This makes "well" a verb.

C: Here, "well" describes how the children behaved, modifying the verb "behaved." This makes "well" an adverb.

D: In this case, "well" works as an adjective, modifying the deserved victory. 

The correct matching would hence be:

1-b, 2-d, 3-a, 4-c

Therefore, Option A is the correct answer.