Sentence Correction

The automotive conveyor-belt system, which Henry Ford modeled after an assembly-line technique
introduced by Ransom Olds, reduced from a day and a half to 93 minutes the required time of assembling
a Model T.

(A) from a day and a half to 93 minutes the required time of assembling a Model T
(B) the time being required to assemble a Model T, from a day and a half down to 93 minutes
(C) the time being required to assemble a Model T, a day and a half to 93 minutes
D) the time required to assemble a Model T from a day and a half to 93 minutes
(E) from a day and a half to 93 minutes, the time required for the assembling of a Model T

Choose D

A- the idiom is "from X to Y"

B- being is usually wrong

C- same as B

D- correct

E- same as A