29. A shy, religious-minded publisher who had married a duke's daughter, Harold Macmillian's rise to the postion of PRime MInister in 1957 surprised many
, though Churchill had since the 1930s been extolling Macmillan's courage.
(D) "Harold Macmillian surprised many by rising to the position of Prime Minster in 1957."
I dont understand why this is the correct answer for the underlined sentence. Can anyone help?
The other choices are:
(B) Harold Macmillan's rise in 1957 to the postion of Prime Minister surprised many
(C) Harold Macmillan's becoming Prime Minister in 1957 surprised many
(E) the position of Prime Minister attained by Harold Macmillan in 1957 surprised many