Final answer:
The Mesopotamian gods are best described as fickle and easily angered due to their unpredictable nature and swift changes in temperament, as reflected in historical texts.
Step-by-step explanation:
To determine which pair of adjectives best describes the character of the gods of Mesopotamia, we should consider the historical context of Mesopotamian culture. The gods were seen as powerful, but also unpredictable and subject to fits of anger. Thus, out of the options provided, b. fickle and easily angered best represents the character traits attributed to the Mesopotamian deities. They were not viewed as consistently pleasant or weak; rather, their temperaments could change swiftly, and they could quickly become displeased with human actions, leading to potential repercussions.