Concept:Find the word with stress on a syllable different from the other three.
Explanation:In option A, "discomfort" has stress on the second syllable: /dɪsˈkʌmfət/.
In option B, "aggressive" has stress on the second syllable: /əˈɡrɛsɪv/.
In option D, "depended" has stress on the second syllable: /dɪˈpɛndɪd/.
Only option C, "quality", has stress on the first syllable: /ˈkwɒləti/.
So A, B, and D share the same pattern, while C differs.
Answer:C. quality