Which is the best synonym for the word vehement as used in this except from "The Morning of June 28, 1949 and 'The Lottery'"?


. . .all letters addressed to me care of the magazine were forwarded
directly to me for answering, and all letters addressed to the magazine---
some of them addressed to Harold Ross personally; these were the most
vehement---were answered at the magazine. . .

A. heated
B. urgent
C. enthusiastic