[单选题]

At 0630 you increase speed to 12.0 knots. At 0645 Race Rock Light bears 294°pgc. At 0700 Race Rock Light bears 293°pgc. Based on this，you should（）.

A . alter course to port

B . maintain course and speed

C . alter course to starboard

D . maintain course and reduce speed

参考答案与解析：

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