Calculate the sum of first 89 natural numbers.	Choose the correct option.
A) 2017  B) 2647  C) 2147  D) 2045  E) 4005

Rationale: "solution we know that ( 1 + 2 + 3 + . . . . . + 89 ) = n ( n + 1 ) / 2 therefore ( 1 + 2 + 3 + . . . . + 89 ) = ( 89 × 90 / 2 ) = 4005 . answer e"
Answer: E