The sacraments by which medieval Christians hoped to receive the grace of God . a. were codified by an early thirteenth-century council b. were first introduced by Waldendsians c. were but one of several paths to salvation d. available to orthodox Christians e. could be administered by any Christian

A. Were codified by an early 13th century church council

Explanation: The sacraments by which medieval Christians hoped to receive the grace of God were codified in the 13 century church council. They believe in purgatory ( after death,purgatory is a place were Christian were punish for their sins and will later be transferred to heaven) most of the churches were dedicated to the virgin Mary. The church maintain authority. The most important aspect of the church practice is the Holy Eucharist.

the answer your looking for is c. : )