Which of the following is an example of ageism?

A. Eifa wants to develop technology to assist elderly people who might be having trouble with motor functions.

B. Shira made fun of her mode of dress him being out of style.

C. Gafar, age 58, is forced to retire from this job after a serious injury.

D. Ehan is ignored at a car dealership and then openly mocked for looking like the child to someone who would buy from them.