Critical Reasoning

Most employees in the computer industry move from
company to company, changing jobs several times in
their careers. However, Summit Computers is known
throughout the industry for retaining its employees.
Summit credits its success in retaining employees to
its informal, nonhierarchical work environment.
Which of the following, if true, most strongly supports
Summit's explanation of its success in retaining
employees?

(A) Some people employed in the computer industry
change jobs if they become bored with their
current projects.
(B) A hierarchical work environment hinders the
cooperative exchange of ideas that computer
industry employees consider necessary for
their work.
Many of Summit's senior employees had
previously worked at only one other computer
company.
(D) In a nonhierarchical work environment, people
avoid behavior that might threaten group
harmony and thus avoid discussing with their
colleagues any dissatisfaction they might have
with their jobs.
(E) The cost of living near Summit is relatively low
compared to areas in which some other
computer companies are located.

[spoiler]OA:b[/spoiler] I did this Q 3 times but i cannot convince with the right answer and each time, i again choose D.. could sum1 give me a reasoning that I persuade it is B