Today, because of improvements in agricultural technology, the same amount of acreage produces double the apples that it has in 1910.
(A) double the apples that it has
'double the apples' is awkward.
(B) twice as many apples as it did- correct
(C) as much as twice the apples it has
much- used for uncountable
(D) two times as many apples as there were
two times- wordy
(E) a doubling of the apples that it did
'a doubling of the apples' is awkward.
-----------------
More about the correct usage of twice, many, much:If you say "twice as many", then this construction should be paired with a countable noun.
e.g., twice as many dogs --> "dogs" is a countable noun
If you said "twice as much", then this construction should be paired with an uncountable noun.
e.g., twice as much water --> "water" is an uncountable noun
If the noun in question is already an explicitly numerical quantity, then you should use neither "much" nor "many". Instead, you should just use "twice" or "double" by itself.
e.g., twice the increase --> "increase" is an explicitly numerical quantity
These rules are followed pretty closely.
For instance:
Twice as much water --> correct, since "water" is an uncountable noun (but is not an explicitly numerical quantity)
Twice the increase... --> correct
Twice the water... --> incorrect, since water is not a numerical quantity
Twice as much as the increase... --> incorrect; redundant
Cheers,
Rajan