Final answer:
Sir Walter Raleigh was the man who attempted to colonize Roanoke, and King Philip's war started after a praying Indian and Harvard graduate was killed by a Wampanoag, making both statements true.
Step-by-step explanation:
Colonization of Roanoke and King Philip's War
Sir Walter Raleigh was indeed the man behind the attempt to colonize Roanoke. This statement is historically accurate, making the correct answer to the question a. True. As for the matter of King Philip's War, it is also true that the conflict erupted following the assassination of a praying Native American and Harvard graduate by a Wampanoag.
These questions reflect on significant historical events involving early English colonization attempts in America and pivotal conflicts between Native Americans and English settlers.