A garrison of 2000 men has provisions for 54 days. At the end of 21 days, a reinforcement arrives, and it is now found that the provisions will last only for 20 days more. What is the reinforcement?  Choose the correct choice from the following answers
A) 1977	B) 1893	C) 1979	D) 1900	E) 1300

Rationale: "2000 - - - - 54 2000 - - - - 33 x - - - - - 20 x * 20 = 2000 * 33 x = 3300 2000 - - - - - - - 1300 answer : e"
Answer: E