li$,$ a $42$ year old computer expert, applied at a software firm, but he was not given the job. He was told that the firm was looking for someone who can design software for the younger generation who use mobile technology. Which act did this firm violate?

Employee Retirement Income Security Act of $1974$

a$.$ Age Discrimination in Employment Act

b$.$ Labor$-$Management Relations Act

c$.$ Employee Retirement Income Security Act of $1974$

d$.$ Affirmative action

e$.$ Title VII of the Civil Rights Act of $1964$