Washing machines and dishwashers are made for using far lesser water now than
older models and, therefore, needs less soap
A. Washing machines and dishwashers are made for using far lesser water now
than older models and, therefore, needs less soap
B. Washing machines and dishwashers are being made to use far less water now
than are the older models and, therefore, need lesser soap
C. Washing machines or dishwashers is made to use far less water now than had
been the older models and, therefore, needing less soap
D. Washing machines and dishwashers are made to use far less water now than was used by the older models and, therefore, need less soap
E. Washing machines and dishwashers are made to use far less water now than
older models and, therefore, need less soap


I know the answer D, while reading i elt parallelism is a bit awkward, can someone throw some light on STRUCTURE of sentence.