Moore Defends Common Sense Against Skeptics and Others Who Deride

Moore defends common sense against skeptics and others who deride our ordinary beliefs. He insists that there is a vast amount of shared knowledge about the world, expressible in ordinary language and about which we can be quite certain. He provides an argument that he thinks decisively defeats skepticism about an external world: If skepticism is true, we do not have knowledge of the external world, but we obviously do have knowledge of the external world; therefore, skepticism is false.
-Moore thinks denying that he knew the proposition about his raised hands would be

A) reasonable.
B) rational.
C) logical.
D) absurd.