What is ageism commonly referred to as?

Ageism is commonly referred to as age discrimination. This term specifically describes stereotypes, prejudice, or discrimination against individuals based on their age, especially in the context of employment and social interactions. Ageism can manifest in various ways, such as assuming that older workers lack the skills or energy of younger employees or conversely, that younger workers are inexperienced or undependable.

In contrast, the other choices refer to different forms of discrimination. Sex discrimination pertains to unfair treatment based on an individual's sex or gender, while gender discrimination encompasses broader issues related to the roles and expectations associated with being male or female. Workplace discrimination is a general term that can include all forms of discrimination, but it does not specifically denote age. Thus, age discrimination accurately captures the essence of ageism, making it the correct choice.