Bunuel
Plant oils
do not represent a new attempt to replace fossil fuels; it was already made by Rudolf Diesel in 1912.
(A) do not represent a new attempt to replace fossil fuels; it
(B) are not a new attempt to replace fossil fuels; the same one
(C) represent not a new attempt to replace fossil fuels, but one that
(D) are not a new attempt to replace fossil fuels, but one that
(E) are not new as an attempt to replace fossil fuels; it
(A) do not represent a new attempt to replace fossil fuels;
it (it is singular and is referring to plant oils which is plural)
(B) are not a new attempt to replace fossil fuels;
the same one (The same one can refer to both plant oils or fossil fuels. Hence the meaning is not clear.)
(C)
represent not a new attempt to replace fossil fuels, but one that (Meaning issue. The meaning conveyed by this statement is that plant oils represent not a new attempt to replace fossil fuels but plant oils represent one that was already made by Rudolf Diesel in 1912. The plant oils can't represent the one that was already made by Rudolf Diesel in 1912.)
(D) are not a new attempt to replace fossil fuels, but one that (
Correct. Meaning conveyed is clear. Plant oils are not a new attempt but the attempt was already made by Rudolf Diesel)
(E) are not new as an attempt to replace fossil fuels;
it (Same as A)