A.Create one global group named G_Executives. Make all executives user accounts members of that group.
B.Create two global groups named G_Executives and one universal group named U_Executives. Make the two global members of U_Executives. Make the executive user accounts members of the appropriate global group.
C.Create three global groups named G_NY_Executives and G_Chi_Executives and G_Executives. Make G_NY_Executives and G_Chi_Executives members of G_Executives. Make the executive user accounts members of the appropriate global group.  
D.Create one domain local group named DL_Executives. Make all executive user accounts members of that group.

A.Create a top-level OU named New York. Place all user and computer accounts from New York in the New York OU.
B.Create a top-level OU named Chicago. Place all user and computer accounts from Chicago in the Chicago OU.
C.Create a top-level OU named Coho. Place all user and computer accounts that are assigned to the Coho Vineyard customer project in the Coho OU.
D.Create a top-level OU named Sales. Place all user and computer accounts from the sales department in the Sales OU.