B. hired architects to build magnificent churches and offices
D. sponsored expeditions to collect classical manuscripts and coins
Explanation:
During the Renaissance the church and patrons (who were previously sponsoring art in Florence) moved to Rome in order to restore basilicas, plazas, and overall discover and attract new talents to develop beautiful architecture in Rome.
Also with the construction of monasteries, the Church (specially monks) started to collect old manuscripts to either learn from them, or hide them from the population, since some of them were from the past Greek philosophers that stated ideas against what the Church wanted to spread at that time.
