Answered

The war between the English colonists and the Wampanoag Confederacy
began when:
A. the Wampanoag leader Metacom declared war on the colonists.
OB. a group of Wampanoag men attacked a rival group of
Narragansett peoples.
C. the colonists formed an alliance with the rival Narragansett
peoples.
OD. the colonial government executed the Wampanoag leader
Metacom.