Answer:
b. It is highly structured and hierarchical and a basic tenet is that the primary purpose of marriage is procreation.
Step-by-step explanation:
There is a strict hierachy in Catholicism. Catholics must accept the pope is the head of the Church, he´s the Vicar of Christ on Earth and his seat is the Vatican. After him, cardinals are the top Church officials and then the bishops. Celibacy of the clergy is obligatory. It opposes abortion and the official position is that the main purpose of marriage is procreation.