A. Effective quality control
B. SmoothGlide technology
C. Metal components
A. They offer live customer service.
B. They have received many awards.
C. The words “customer service” are engraved on every product.
A. It looks better.
B. It lasts longer.
D. It repels household pests.
A. They automatically install themselves.
C. They can only be paid for in cash.
D. They are available at every corner store.
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B. 5,000
C. 500
D. 10