Write the expression 3ln(x) - (1/2) ln(y) + 2ln(z) as a single logarithm with a coefficient of 1. Assume all variables represent positive real numbers.

a) ln(x³/√y) + ln(z²)
b) ln(x³/y(1/2) ) + ln(z²)
c) ln(x³/(y(1/2) * z²) )
d) ln(x³/y(1/2) * z²)