Three of the five position integers p, q, r, s, t are even and two of them are odd (not necessarily in order). Consider the following:
1. p + q + r - s - t is definitely even.
2. 2p + q + 2r - 2s + t is definitely odd.
Which of the above statements is/are correct?

A

1 only

B

2 only

C

Both 1 and 2

D

Neither 1 nor 2