Answer:
A. Age bias
Explanation:
Age bias -
The term Age bias was first given by Robert Neil Butler in the year 1969 .
It refers to the type of discrimination amongst the people , on the basis of the age group they fall in , is referred to as age bias.
This discrimination can be systematic or casual .
It is also known as Ageism or ageism .
Hence , from the given information of the question,
The correct option is A. Age bias.