"In the War in Which We Are Now Engaged Racial

"In the war in which we are now engaged racial affinities are not severed by migration.The Japanese race is an enemy race and while many second and third generation Japanese born on United States soil,possessed of United States citizenship,have become "Americanized," the racial strains are undiluted.To conclude otherwise is to expect that children born of white parents on Japanese soil sever all racial affinity and become loyal Japanese subjects,ready to fight and,if necessary,to die for Japan in a war against the nation of their parents.... It,therefore,follows that along the vital Pacific Coast over 112,000 potential enemies,of Japanese extraction,are at large today.There are indications that these are organized and ready for concerted action at a favorable opportunity.The very fact that no sabotage has taken place to date is a disturbing and confirming indication that such action will be taken."
General John Dewitt used what argument to convince President Roosevelt to imprison Japanese Americans?

A) That their race made their support of Japanese forces inevitable
B) That it was only a matter of time before Japanese Americans left America anyway
C) That there were few Japanese Americans,so it would be easy to imprison them
D) That Japanese Americans would be able to turn other ethnic minorities against the American cause in favor of the Japanese