Final answer:
option (c) is the correct answer.The man in the restaurant got upset with the waitress because she brought him a salad with Italian dressing instead of ranch dressing.
Step-by-step explanation:
The man in the restaurant got upset with the waitress because she brought him a salad with Italian dressing instead of ranch dressing.
In the given options, option (c) is the correct answer.
This can be inferred from the sentence 'He avoided talking to McTeague, read the paper continually, answering the dentist's timid efforts at conversation in gruff monosyllables.' It suggests that the man was upset with the waitress and showed his frustration by being verbally abusive towards her.