Answer:
The dinner is in the oven.
Explanation:
We use "in" to indicate that something is contained within or enclosed by a space, as in the case of the dinner being inside the oven. "In" is the correct preposition here because it accurately describes the location of the dinner.
Why the other options are wrong?
"On" is incorrect because it implies that the dinner is physically resting on top of the oven, which is unlikely unless there's a specific reason for it, like warming up food briefly.
"At" is incorrect because it suggests a specific point or location, which doesn't apply to the situation of the dinner being inside the oven. "At" would be more suitable for specifying a location like "at the restaurant" or "at home," rather than the inside of an object.
