Which example would be most likely to be considered quid pro quo sexual harassment?

Select one:

a$.$ A customer who makes comments about an employee's physical attributes every time they interact

b$.$ A supervisor who asks for a sexual favor in return for an employee to keep their job

c$.$ Frequent sharing of jokes with sexual connotations with coworkers

d$.$ Repeated offers to take a coworker who isn't interested out on a date