Party member is engaged in geomantic omen.

Analysis of test questions: feudal superstitious activities regard ghosts and gods as the origin of the world, but deny that matter is the origin of the world, and matter determines consciousness. It is obviously wrong for a few party member cadres to engage in feudal superstitious activities. A does not match the meaning of the question; The mistakes mainly lie in denying that the world is material, that matter is the origin of the world, that D is correct, and that BC is inconsistent with the meaning of the question.