The Greeks believed the powers of the gods explained natural events. For example, thunderstorms over land occurred when Zeus became angry and hurled his lightning bolt. Storms at sea were likewise caused when his brother Poseidon became enflamed. In order to appease the gods, Greeks observed spiritual rituals, such as sacrificing animals in their honor or in gratitude for their assistance.

In this passage, the word appease means:

A. please
B. help
C. thank
D. protect