During the red scare after ww ii this u. s. house of representatives committee was created to look into disloyalty in america.
a. judiciary committee
c. disloyal americans committee
b. foreign relations committee
d. un-american activities committee

The answer is letter D.  The Un-American Activities Committee. This was established  to root Nazi spies and sympathizers in the United States.  Later it also monitored those who had ties with communism as well.  It was similar to the tactics used by Senator Joe MacCarthy.

concurrent jurisdiction is the ability to exercise judicial review by different courts at the same time, within the same territory, and over the same subject matter. for instance, a domestic violence matter may be heard in either a general civil court or a family court in the same county. whichever court actually exercises its jurisdiction first will do so exclusively.