Which of the Following Illustrates Concurrent Powers,as Granted by the U.S.Constitution,exercised

Which of the following illustrates concurrent powers,as granted by the U.S.Constitution,exercised by a state?​ 

A)  The state of Uknia signing a peace treaty with its hostile neighboring state​ 
B) The state of Hutsen regulating trade and commerce with other states in the country 
C) The state of Ryeland printing currency notes to be used concurrently with the national currency 
D) The state of Gillibert levying income tax on all its employed citizens 
E) The state of Yolka establishing post offices in its municipalities