His aunt’s letters _____him of those beautiful days when they used to live together in his home..

call up：想起某事物.回忆某事，call for：需求.需要，call on：号召.请求拜访（某人），call at：拜访（某地）。他婶婶的信使他想起了他们在一起度过的日子，故选A。