Columnist: Analysts argue that as baby boomers reach the age of 50, they will begin seriously planning for retiremen...

Mehran on February 8, 2018

Of course! The problem with (D) is that the columnist does not argue that the analyst's conclusion is basically right.

The analyst's conclusion is, "more money will flow into the stock market, resulting in continued gains in stock prices."

The columnist's conclusion is, "therefore high stock prices will not be justified, and thus boomer's money will more likely flow into investments other than stocks."

This is an alternative conclusion.

This is why (C) is the correct answer.

Hope that helps! Please let us know if you have any other questions.