In a dairy farm, 26 cows eat 26 bags of husk in 26 days. In how many days one cow will eat one bag of husk?  Choose the correct choice from the following.
A) 1	B) 40	C) 20	D) 26	E) 30

Rationale: "explanation : one bag of husk = 26 cows per day ⇒ 26 × 1 × 26 = 1 × 26 × x for one cow = 26 days answer : d"
Answer: D