Here's a problem to solve: Why is watering plants and grass in the early morning a way to conserve water?

Among the 4 following options, which is the correct answer?

- A: There is always more water in the morning.
 
- B: Smaller amounts of water evaporate in the cool morning.
 
- C: Water used in the morning can be recycled for afternoon use.
 
- D: Grass can absorb water only in the morning.
 