How would the meaning of this passage change if he had used the word “anger” instead of the word “rage”?

In the following passage from "The Perils of Indifference," Elie Wiesel describes the memory of being liberated from the Buchenwald concentration camp by American soldiers.

How would the meaning of this passage change if he had used the word “anger” instead of the word “rage”?

"Liberated a day earlier by American soldiers, he remembers their rage at what they saw. And even if he lives to be a very old man, he will always be grateful to them for that rage, and also for their compassion."

Group of answer choices

a. The word “rage” emphasizes the intensity of their feelings. “Anger” does not.

b. The word “rage” lessens the intensity of their feelings. “Anger” does not.

c. The word “rage” would imply the soldiers were more energetic.

d. The word “anger” is a more formal choice for a speech.