Answer:
Option: B. Primary source.
Explanation:
The letter, being a part of the Roman soldier stationed in Great Britain in 70 CE, is a piece of first-hand information about that period, which reflects about the way the Roman Soldier felt and experienced while stationed in Great Britain.
The letter is a primary source because it reflects about the past without being changed since its documented. Primary sources are original documents that concerns with the historic topic, can be later studied and experienced by a historian. Sources can be documents, artifacts, photographs, and testament.
