The correct answer is "Great Britain".
The German attack on RMS Lusitania and sinking of the same ship by a submarine caused Americans to join the war. This is just simply put of course, there were many other reasons.
Answer:
Secondary source
Explanation:
We have two types of sources of information namely; Primary sources and secondary sources. Primary sources are documents or an event that happens when a researcher is at the field. Primary sources are first-hand accounts while the secondary sources are events that have occurred before or looking into the past.
From the above question, we can see that the princess is a researcher that wants to know the history of past princesses. The princess journal serves as a secondary source of information because it contains stories that have happened before.