What Situation Would Lead to a Drought Having Occurred

What situation would lead to a drought having occurred?

A) A wildfire burns for several days, causing severe damage to crops.
B) A coal-fired power plant has a spill, rendering the water supply undrinkable in the surrounding areas.
C) Hotter than normal temperatures during the entire spring season cause plants to produce leaves and flowers earlier than normal.
D) Lower than normal rainfall for several months leads to irrigation restrictions in the region, resulting in crop failures.