a warm, rainy day a warm, sunny day a warm, cloudy day a hot, cloudy day
I gave my students this multiple choice question: A student is investigating solar energy by cooking food in an oven powered by the Sun. On which of the following days will the food cook most quickly?

Only one answer is correct among these 4 choices:
- a warm, rainy day
- a warm, sunny day
- a warm, cloudy day
- a hot, cloudy day

Could you tell me which one is correct?

a warm, sunny day