The correct option is C excommunicate
Excommunication is the Church’s most severe penalty imposed for particularly grave sins. Through baptism, a person is incorporated into the body of the Church through which there is a “communication” of spiritual goods. By committing a particularly grave sin and engaging in activities which cause grave scandal and fracture the body of the Church, that communication ceases, and the person is deprived of receiving the sacraments and other privileges.Excommunication is imposed by a decree of the Pope or a bishop in communion with him and a king could be excommunicated for not adhering to the church. Hence, Option A is correct. The king was chosen by the nobility and his predecessor while a king could not be summoned, but could summon someone else. Hence, these are incorrect.