Sentence Correction

While some propose to combat widespread illegal copying of computer programs by attempting to change
people's attitudes toward pirating,others by suggesting reducing software prices to decrease the
incentive for pirating, and still others by callingfor the prosecution of those who copy software illegally.
(A) by suggesting reducing software prices to decrease the incentive for pirating, and still others by calling
(B) by suggesting the reduction of software prices to decrease the incentive for pirating, and still others call
(C) suggest the reduction of software prices for decreasing the incentive for pirating, and still others call
(D) suggest the reduction of software prices to decrease the incentive for pirating, and still others by calling
(E) suggest reducing software prices to decrease the incentive for pirating, and still others are calling

mundasingh123 wrote:While some propose to combat widespread illegal copying of computer programs by attempting to change
people's attitudes toward pirating,others by suggesting reducing software prices to decrease the
incentive for pirating, and still others by callingfor the prosecution of those who copy software illegally.
(A) by suggesting reducing software prices to decrease the incentive for pirating, and still others by calling
(B) by suggesting the reduction of software prices to decrease the incentive for pirating, and still others call
(C) suggest the reduction of software prices for decreasing the incentive for pirating, and still others call
(D) suggest the reduction of software prices to decrease the incentive for pirating, and still others by calling
(E) suggest reducing software prices to decrease the incentive for pirating, and still others are calling

IMO E.

Basic structure is as follows:

While Some propose to do X by doing A, others suggest [by] doing Y, and still others by calling for Z

Also, "for decreasing" is incorrect as the phrase does not expresses the "goal" of "reducing the software price".