Which of These Observations Have Been Made About the Moon

Which of these observations have been made about the Moon that will be very helpful (if they prove true) as humans begin to plan for its colonization?

A) discovery of evidence of water (as ice) that can be used for the support of life, the growth of food, and as fuel if it is split by sunlight into hydrogen and oxygen
B) its synchronous rotation, keeping one side opposite Earth at all times, simplifying communication with Earth stations
C) mapping of rilles that, as collapsed lava tunnels, indicate that intact tunnels may be found that will be useful as shelter for early settlers
D) discovery of coal, an essential source of fuel, in various locations

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