The tone that can be detected from the witness testifying in Document 4 was that of indifference.
Why was indifference the tone?
A person is said to be indifferent in tone when they simply recite a story in neutral terms. They basically state facts without adding emotions.
The SS guard in this testimony conveyed no emotion as he described the way they killed the 30 - 40 Jewish women by gassing them.
In conclusion, option B is correct.
Find out more on indifference at https://brainly.com/question/9959232.
