The correct answer is (D) Lay people; laymen; a body of religious worshippers, rather than the clergy; members of a religious faith, rather than the religious leaders. Also, persons outside of a particular profession or learned calling; those who lack the professional knowledge of a particular subject or field.

Laity comes from lai [lay]+ ty.

Examples of use:

• The laity in Christian churches generally occupy pews facing the altar.
• Physicist Steven Hawking has written several popular books for the laity.