If 1 + (1/2) + (1/3) + ... + (1/20) = k, then what is the value of (1/4) + (1/6) + (1/8) + ... + (1/40)?
A
k\/2
B
2k
C
(k \u2013 1)\/2
D
(k + 1)\/2
Correct Answer: (k \u2013 1)\/2