Answer: D. Sunni Islam because it is a specific religion with set doctrines
Step-by-step explanation:
A is wrong because a denomination is a religious organization that is not state sponsored.
B is wrong because Christianity is a religion, not a denomination
C is wrong (common sense reasons)
**A denomination is a "a subgroup within a religion that has a common name, tradition, and identity" (pediaa.com)**
D is correct because Sunni Islam is one of the three denominations to Islam.