Design the simplest POS circuit that implements the function.
f(x1,x2,x3) = PRODUCT M(0,2,5)
A. f = (x1 + x3)(xbar + x2 + xbar3)
B. f = (x1 + x3)(xbar1 + xbar3)
C. f = x1(xbar1 + x2 + xbar3)
D. f = (x1x3)(xbar1 + x2 + xbar3)
By filling out a karnaugh map based on the expression we find the equation.