The word <em>whom </em>in this sentence is used as 2. object of a preposition.
Since it can be found after a preposition <em>for, </em>it is object of a preposition.
c)
To inspire her subjects to battle an invading army.
Answer:
First-hand accounts offer a wide variety of truthful and reliable information.
Explanation:
In addition, an in-depth analysis of the information can be carried out, since descriptive and real data are available that allow accurate and reliable conclusions to be obtained.
The first-hand stories make us live through the situations or events that occurred in a certain place or time, the characters come to life, therefore they are more credible than other stories told by people who were not present.