What is non-rentable space, and what percentage of the terminal does it typically represent?
a) Non-rentable space refers to areas dedicated to airport operations and services; it typically represents 25% of the terminal.
b) Non-rentable space refers to areas inaccessible to passengers; it typically represents 10% of the terminal.
c) Non-rentable space refers to areas used for aircraft maintenance; it typically represents 5% of the terminal.
d) Non-rentable space refers to areas not suitable for commercial activities; it typically represents 15% of the terminal.