If executive order 9066 was unconstitutional, why was it allowed to stand?

a. japanese americans did not protest the order, so efforts to end it lost momentum
b. there was evidence that japanese americans really were japan plan an invasion on u. s
c. the supreme court ruled that during war time, the constitution can be overridden in the name of national security
d. since it was only temporary, and would not last once the war was over, it was allowed to stand.