Statement (I): Commercial airplanes save fuel by flying at higher altitudes during long trips.
Statement (II): At higher altitudes, the ambient temperature and the Carnot efficiency are low.
(A) Both Statements (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)
(B) Both Statement (I) and Statement (II) are individually true but Statement (II) is NOT the correct explanation of Statement (I)
(C) Statement (I) is true but Statement (II) is false
(D) Statement (I) is false but Statement (II) is true