Satellite imaging allows scientists to observe . a.
where deforestation has removed the trees
b.
where deforestation has occurred but is recovering
c.
where deforestation has not occurred
d.
all of the above

the answer is D. all of the above

Explanation:

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you must remain stopped until the stop signal is retracted and the red lights are turned off. approaching traffic in the opposite roadway of a divided highway shall not be required to stop, even if the school bus has the stop-arm extended and the alternately flashing warning signal lamps on.

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