The members of the United States Marine Corps (USMC) are famed for their intense devotion to one another. The Marine motto "Semper Fidelis" (Latin, "Always Faithful") is taken to connote, among other things, the lifelong devotion a Marine has to his or her comrades in the corps. Psychologists who study cohesion among groups have concluded that the USMC creates this intense bond through its unique Recruit Training program.

Which of the following, if true, most helps to justify the psychologists' position?

A:Throughout their time in the Corps, whether during war or peace, Marines frequently engage in activities that reinforce the value of cooperation and camaraderie.

B:New recruits are far more likely to engage in independent behavior during the early stages of the USMC Recruit Training than during later stages.

C:All branches of the armed forces have levels of internal cohesion much higher than typical civilian groups of similar aged individuals.

D:During their time in the USMC Recruit Training, new recruits have minimal interactions with people outside of the corps.

E:It is well documented that intense professional training programs, such as medical school, form strong bonds among participants.