One of the statements below contains a word used incorrectly or inappropriately. Choose the option which has the incorrect or inappropriate usage of the word

All four sentences contain the word "diffuse," which can have different meanings based on context. We examine each option to identify where the word is misused.

Option A: [Every morning, the aroma of freshly baked bread diffuses throughout the house, enticing everyone to the kitchen.] uses "diffuses" correctly. Here, it means the aroma spreads through the house, which is the proper usage.

Option B: [The stained glass diffused the light filtering through the windows.] also uses "diffused" correctly. Here, it means the glass scattered the light, which is the proper usage.

Option C:[Realising that the argument between the two groups of students was getting out of control, the teacher diffused the situation by quickly changing the topic.] uses "diffused" incorrectly. While "diffuse" can mean to spread out physically, it doesn't properly apply to calming a situation. The correct word would be "defused" (meaning to reduce tension).

Option D: [He used a fan to diffuse the smoke that had accumulated in the kitchen while cooking.] uses "diffuse" correctly. Here, it means to disperse the smoke, which is the proper usage.

Only Option C misuses the word "diffuse." The correct choice is therefore C.