Religious discrimination includes:a). recommending a Sunday School. b). refusing to hire or fire someone after learning their religion. c). accommodating religious-related garb. d). being open for business on Sundays.

b). refusing to hire or fire someone after learning their religion.

Explanation:

Religious discrimination -

Treating people of different religion and community differently, is referred to as religious discrimination.

The process of Religious discrimination, is observed, when a particular religion is given the preference over some other religion, like considering for a job, using public space etc.

Hence,

from the given options, religious discrimination is observed in, b). refusing to hire or fire someone after learning their religion.