In this task, you are given two facts, and a multiple-choice question. Based on the given facts, answer the question with index of the correct option (e.g, "A").
Q: Fact1: Some precipitation that falls on land may soak into the ground, becoming groundwater., Fact2: Wells are drilled into groundwater and springs are fed by groundwater., Question: Springs can be fed by what? (A) mechanical waves (B) vernal equinox (C) precipitation (D) rainfall (E) digestive track (F) water vapor (G) aqueous solution (H) carnivores
A:
C