A train crew receives a track warrant authorizing them to 'WORK BETWEEN' MP 50 and MP 60. Which of the following movements is permitted under this authority?
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A
Proceed directly from MP 50 to MP 60 and report clear.
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B
Move in either direction between MP 50 and MP 60.
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C
Only move from MP 60 towards MP 50.
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D
Occupy the main track at MP 50 but not proceed towards MP 60.