3个问题请教

mlvince

(The supply of oil being finite has become an economical )and political consideration of the first magnitude for all modern industrial nations.
B the finite supply of oil has become an economical
C that the supply of oil is finite has become an economical
D the supply of oil being finite has become an economic
E that the supply of oil is finite has become an economic
关于答案d 我记得在哪里见过that开头的句子都是错的，有没有这么个说法？

(The domesticated camel, which some scholars date) around the twelfth century B. C., was the key to the development of the spice trade in the ancient world.
B the domesticated camel, which some scholars have thought to occur
C domesting the camel, dated by some scholars at
D the domesticated of the camel, thought by some scholars to have occured
E the camel's domestication, dated by some scholars to have been
求解求解。。。。。。这个很不明白答案d

Frances Wright's book on America contrasted the republicanism of the United States (with what she saw as) the aristocratic and corrupt institutions of England
B with that which she saw to be
C to that she saw being
D and that which she saw as
E and what she saw to be

e