Some writing questions

Rtgrove123
Thu, 24 Jul 2008 20:14:58 +0000

(Whether the ancient Egyptians actually sailed or did not) to South America remains uncertain, but Heyerdahl’s Ra 11 expedition demonstrated that they could have done so.

A. As is
B. Whether in actuality the ancient Egyptians sailed or did not
C. The actuality of sailing by the ancient Egyptians
D. That the ancient Egyptians actually sailed
E. The ancient Egyptians, their actual sailing

Correct Answer: C
Why is A wrong and C right?

(In the opinion) of hte lecturer, (a background) in history of the Middle Ages is not a condition necessary (in) (the enjoyment of) medieval literature.

Correct Answer: C
Why is this idiomically incorrect?

THANKS,
Robbie