对于公用配电变压器停电，采取负荷转移或其他措施未导致所供低压用户停电的情况，（）。
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You are on a cargo vessel carrying toluol in bulk in portable tanks. Which is a requirement for pumping the toluol? （）
A. Hose connections to the tank must be made with a minimum of three bolts
B. There must be water pressure on the fire main
C. You must shut down if another vessel comes alongside
D. If transferring at anchor，you must display a red flag by day and a red light at night
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