Turning effects of forces — practice question

In a machine, several couples act on a rotating object, as shown. What is the net torque acting on the rotating object?

• A$4.7\,\text{N m}$
• B$8.6\,\text{N m}$
• C$9.3\,\text{N m}$
• D$17.1\,\text{N m}$