Final answer:
In Maslow's theory, a nonhostile sense of humor indicates the ability to laugh at oneself, which often signifies a level of self-actualization. The correct option is a. the capacity to laugh at oneself.
Step-by-step explanation:
According to Maslow's theory, a nonhostile sense of humor refers to the capacity to laugh at oneself. This concept is associated with self-actualization, which represents the highest level of Maslow's hierarchy of needs. Individuals who have reached this level are able to find humor in their own imperfections and human condition, without expressing scorn or hostility towards others.
Most cultures embrace laughter as a sign of joy or pleasure, reflecting the universal nature of humor. Humor helps to navigate stressful situations and fosters a sense of unity. This is in line with the anthropological research by George Murdock, who found laughter and jokes to be cultural universals that release tension and create social cohesion.