Which of the following can be viewed as a violation of the establishment clause of the First Amendment to the U$.$S$.$ Constitution?

Select one:

A$.$ The coach allows no religious expression of any kind in the locker room or on the practice field.

B$.$ The team has a one$-$practice weekend policy; athletes can attend a practice either Sunday or Monday.

C$.$ A number of players on the team have asked to pray before games; the coach allows it but does not require that other players participate.

D$.$ As part of a well$-$being aspect of training, a coach institutes a weekly sessions$-$ith a Buddhist monk to teach the team meditation and Buddhist philosophy; attendance for athletes is mandatory.