Need help asp me and my brother are doing a Challeng and whoever get this answer right or first they get 100 dollars because my family is rich. here the question Two forces are described below:

Force 1: The upward force exerted by a chair on us when we sit on the chair
Force 2: The force which prevents us from slipping when we walk on a smooth surface

Which statement is true about the forces.
A Both are contact forces.
B, Both are non-contact forces.
C, Force 1 is a contact force and Force 2 is a non-contact force.
D Force 1 is a non-contact force and Force 2 is a contact force.