单选题 Now many manufacturers build their business reputations by enclosing ______ in the new products in case of damage in shipment or by incorrect operation.
A. categories B. accessories C. analogies D. observatories

【正确答案】 B
【答案解析】accessory附件；category范畴，门类；analogy比拟，类比；observatory观察站，天文台。故选B。