Final answer:
During the Black Plague, people shifted their beliefs to superstitions, witchcraft, and individualistic spiritual practices, laying the groundwork for later religious reforms.
Step-by-step explanation:
During the Black Plague, aside from those who kept their faith in the Christian Church, others shifted their beliefs to a mixture of superstitions and mysticism, while some rationalists and early scientists began to observe and analyze natural phenomena as separate from divine will. This period saw the rise of new religion spiritual practices and the questioning of the church's authority, which later contributed to the Protestant Reformation. The social upheaval and the significant decline in population from the plague eventually led to various structural changes, including shifts in socioeconomic hierarchies and the undermining of feudalism.
The most accurate answer to the shift in beliefs during the Black Plague is B) Superstitions and witchcraft, as well as a rise in mystic and individual spiritual practices.