一道SAT语法题1.Whether the ancient Egyptians actually sailed or d

一道SAT语法题
1.Whether the ancient Egyptians actually sailed or did not to South America remains uncertain,but Heyerdahl's Ra expedition demonstrated that they could have done so.
A.Whether the ancient Egyptians actually sailed or did not
B.Whether in actuality the ancient Egyptians sailed or did not.
C.The actuality of the sailing by the ancient Egypitians.
D.That the ancient Egyptians actually sailed
E.The ancient Egyptians,their actual sailing
麻烦逐条分析,