Evaluate the indefinite integral$(1)3$dxx$(1$x$)3.$

Select one:

a$.$

$1(1)4+1(1$x$)4+$C

b$.$

$1(1)2+1(1$x$)2+$C

c$.$

$1(1)2+1(1$x$)2+$C

d$.$

None of the above