AMC 12B 2010 Problem 14

Let a, b, c, d, and e be positive integers with a+b+c+d+e=2010, and let M be the largest of the sums a+b, b+c, c+d and d+e. What is the smallest possible value of M ?

Answer Choices
A. 670
B. 671
C. 802
D. 803
E. 804