The finding from Korematsu v. United States justifies the actions taken against the ethnically Japanese citizens of the United States by noting that

A. it was legitimate to suspect them of having conflicted loyalties.
B. the U.S. had only acted against those accused of crimes.
C. the U.S. had addressed the situation militarily.
D. it was only noncitizens who faced additional scrutiny.

A. it was legitimate to suspect them of having conflicted loyalties.