Ganesh Malkar

A survey by the National Council of Churches showed that in 1986 there were 20,736 female ministers, almost 9 percent of the nation's clergy, twice as much as 1977. A) twice as much as 1977 B) twice as many as 1977 C) double what it was in 1977 D) double the figure for 1977 E) a number double that of 1977's The answer is D Not Understood why :) My understanding many - countable and much - uncountable when to use what? double or twice?