Igor Put the Following Post on a Discussion Forum at Work

Igor put the following post on a discussion forum at work: "I've noticed that some coworkers seem discouraged about how the company is doing. I thought it might help if we discussed the causes of and possible remedies for this malaise. My personal opinion is that management doesn't care what we think, which causes people to feel detached. I welcome other viewpoints." What could Igor have done to improve his post?

A) He should not have gone off topic.
B) He should have made the post much longer.
C) He should have avoided sarcasm.
D) He should have welcomed competing points of view.
E) He should not have included a blaming statement.