An object with a weight of P=100N is placed on a horizontal surface, as shown in the figure, the friction factor in between is fs=0.2, and the object is stationary under the action of horizontal force F=10N, the friction force is ________.
A、20N
B、10N
C、2N
D、-10N

A．First Emperor Qin Shi Huang’s cruel behavior.
B．The kings of Qin and Qi called each other emperors.
C．Many dukes declared themselves kings.
D．The cruel wars caused the death of ordinary people.