is one of the factors on which membership in an ethnic category is based.A.AgeB.Skin colorC.GenderD.Religion

Membership in an ethnic category can be based on several factors. These factors often include shared characteristics such as culture, language, and history. Let's look at the options you provided:

A. Age - Age is not typically a factor in determining ethnic category. Ethnicity is usually based on cultural heritage and shared traditions, not the age of an individual.

B. Skin color - While skin color can sometimes be associated with certain ethnic groups, it is not a definitive factor. There are many ethnic groups that have a wide range of skin colors.

C. Gender - Gender, like age, is not a factor in determining ethnic category. Both men and women can belong to any ethnic group.

D. Religion - Religion can sometimes be a factor in ethnic categorization, as certain ethnic groups may be associated with specific religions. However, it is not always the case, as people of different religions can belong to the same ethnic group.

So, out of the options provided, religion (D) would be the most likely factor on which membership in an ethnic category could be based, but it's important to note that ethnicity is typically determined by a combination of factors, not just one.