How can Ignacio use the word's context to verify that his inference is correct?

A.
He can break the word into parts, vouch + safe, and infer its meaning in the context of the excerpt.
B.
He can determine that a visit from a king would be viewed as a privilege by a citizen.
C.
He can read an online modern retelling of the scene to see whether the context is the same.
D.
He can look up the word in a dictionary and then substitute its definition in the lines.