Final Answer:
In 2015, among the 13.3 million non-institutionalized older adults living alone, the majority were 2) women.
Step-by-step explanation:
In 2015, among the 13.3 million non-institutionalized older adults living alone, the majority were women. To understand this, we can delve into the demographic data. Let's denote the total number of older adults living alone as T. According to the question, T = 13.3 million. Now, let W represent the number of women living alone and M represent the number of men. The question is asking for the majority gender, so we are comparing W and M.
If W > M, then the majority gender is women. To determine this, we need to consult the given data. The question doesn't provide specific figures for women and men, but since the majority of older adults living alone are women, we can conclude that W > M.
In summary, the answer to the question is 2) Women, as the majority of the 13.3 million non-institutionalized older adults living alone in 2015 were women. This conclusion is drawn based on the understanding that the term "majority" implies a larger quantity, and given the context of older adults living alone, the demographic trend leans toward a higher number of women in this category.
Therefore, the correct answer is 2) Women.