A rod of uniform material has a variable cross-section given by (A)/(A_(1))=1+(0.01(x)/(L)), where A_(l) at one end is 0.01m^(2), L is the length of the rod which is 1m, and the temperature at the two ends. What is the equation for the cross-section of the rod?

A) (A)/(A_(1))=1+(0.01(x)/(L))
B) (A)/(A_(1))=1+(0.01(x)/(L))+(0.01(x^(2))/(L^(2)))
C) (A)/(A_(1))=1+(0.01(x)/(L))-(0.01(x^(2))/(L^(2)))
D) (A)/(A_(1))=1-(0.01(x)/(L))