His response was so terse that I thought he must be angry at my question.
According to the dictionary, terse means brief and sparing in the use of words, and abrupt.
The speaker feels that the response he got was short because the responder was angry at the question he asked.
Though "concise" and "pithy" also mean that the reply was short, they do not mean that the response was abrupt.
The abruptness in the response is the reason why "terse" is the most suitable choice to fill in the blank
Learn more here: https://brainly.com/question/12656804
