Answer:
D, all of the above
Step-by-step explanation:
Honestly, this is a pretty delusional question. To be fair to the employer, her skills were probably outdated. The employer most likely had bias based on her age, making this biased. He also classified her skills as outdated, making it age stratification. The employer assumed Asa's skills were outdated due to her being 80 years old, making it ageism.