Answer: D
Analysis：
枪 (Qiāng) : spear, a long pointed rod used as a weapon.
矛 (Máo) : pike, consisting of a spearhead attached to a long pole or pikestaff.
棍 (Gùn) : stick, a long thin piece of wood which is used for supporting someone's weight or for hitting people or animals.
壁 (Bì) : wall, an architectural partition with a height and length greater than its thickness.
As we can see, “枪 (Qiāng) spear”, “矛 (Máo) pike”, “棍 (Gùn) stick” are traditional Chinese weapon, while “壁 (Bì) wall” is a structure that defines an area. So, the answer should be D.
