The aided big business by reducing the power of labor unions in the united states. specifically, it meant that unions could no longer demand that only union members be hired by businesses, nor engage in secondary boycotts of businesses selling or handling nonunion goods. a. the national interstate and defense highways act of 1956 b. the taft-hartley act of 1947 c. the servicemen's readjustment act of 1944 d. the william levitt act of 1958

The answer is B
   
The new agreement helped big business by reducing the power of unions in the United States. In particular, it meant that trade unions could no longer demand that only trade unionists be hired by companies, or participate in secondary boycotts of companies that sold or manipulated non-union goods.

A. The 1956 National Interstate and Defense Highway Law
   
B. The Taft-Hartley Act of 1947
   
C. The 1944 Officer Readjustment Act
   
D. The William Levitt Act of 1958