For every integer k from 1 to 10, the kth term of a certain sequence is given by ((-1)^(k+1) ) * ((0.5)^k). If T is the sum of the first 10 terms in the sequence, the T is

a) greater than 2
b) between 1 and 2
c) between 0.5 and 1
d) between 0.25 and 0.5
e) less than 0.25




Answer : D