A lab rat weighs 265g and absorbs 1.68x10^10 beta decay particles, each with ernegy of 2.20x10^-13 J. If relative biological effectiness is 0.75, what is the equivalent dose?
a) 1.04x10^-2 sv
b) 1.39x10^-2 sv
c) 1.04x10^-5 sv
d) 1.39x10^-5 sv
e) 6.23x10^-13 sv