【单选题】The coast of the state of Maine is one of the most irregular in the world. A straight line running from the southernmost coastal city to the north- ernmost coastal city would measure about 225 miles. ...
A.
the continued existence of national parks is threatened by budget cuts.
B.
the best way to preserve the environment on Mt. Desert Island is to limit the number of visitors.
C.
national parks allow large numbers of peo- ple to visit and learn about interesting wilderness areas.
D.
Mt. Desert Island is the most interesting tourist attraction in Maine.