The work done in increasing the size of a rectangular soap film with dimensions 8cm x 3.75cm to 10 cm x 6 cm is 2 x 10−⁴ J.The surface tension of the film in N/m is:
A 3.3 x 10-²
B 165 x 10-²
C 8.25 x 10-²
D 6.6 x 10-²