What is the sum of all even integers between 99 and 301?
Select the correct option
A) 20200 B) 20000 C) 40400 D) 40000 E) 44000

Rationale: "a = 100 , tn = 300 a + ( n - 1 ) d = 300 = > n = 101 sn = n / 2 ( a + l ) = 101 / 2 ( 100 + 300 ) sn = 20200 answer : a"
Answer: A