psychological studies

Journal: In some psychological studies, subjects were given statements that caused them to form new beliefs. Later, subjects told the original statements were false. The studies report, however, that the subjects persevered in their newly acquired beliefs, even when after told the original statements were false. This strongly suggests that humans continue to hold on to beliefs in the absence of credible evidence to sppt them.

Which one of the following most undermines argument?

(a) Regardless of the truth of what subjects were later told, the beliefs based on the original statements were, in most part, correct
(b) It is unrealistic to expect pple to keep track of the basis of their original statements , and to revise a belief when basis is undercut
(c) The statements originally given to subjects would be highly misleading even if true
(d) Most subjects had acquired confirmation of their newly acquired beliefs by the time they were told the original statements were false
(e) most subjects were initially sceptical of statements originally given to them.