Task: Question Answering
Input (English): Question: During a sale, a store sells 20 percent of its remaining stock each day, without replenishment. After four days, what fraction of its original stock has it sold?

 Option A: 1/625

 Option B: 256/625

 Option C: 61/125

 Option D: 64/125

 Option E: 369/625
Output (English): Option E