Final answer:
The Book of Common Prayer is the official prayer book of Anglicanism, established during the Elizabethan Religious Settlement of 1559. It represents a theological compromise between Catholic and Calvinist practices and doctrines.
Step-by-step explanation:
The Book of Common Prayer is the official liturgy of C) Anglicanism. It was established as part of the Elizabethan Religious Settlement in 1559, which included two acts of Parliament. The first conferred upon Elizabeth the title Supreme Head of the Church, and the second was the Act of Uniformity which created the Anglican prayer book.
The theology of the Book of Common Prayer represents a compromise, blending elements of Catholicism and Calvinist theology. While retaining some Catholic rituals like stained glass and incense, it also introduced reforms such as allowing priests to marry and modifying the concept of free will and predestination.
It recognized the two Protestant sacraments of baptism and communion, but also the remaining five Catholic sacraments, moving away from a firm belief in transubstantiation.