In the sentence “John was asked to leave after his three-day stay in the town”, “stay” is considered an example of the word-formation process using （）.

In the sentence “John was asked to leave after his three-day stay in the town”, “stay” is considered an example of the word-formation process using （）.
A.compounding
B.derivation
C.conversion
D.acronym
正确答案：C