Answer:
The Allied nations, especially Great Britain
Explanation:
The cash & carry plan (september 1939) allowed the sale of military arms to belligerents. It replaced the Neutrality Acts of 1937 by which belligerents could purchase only nonmilitary goods. The plan stimulated U.S. manufacturing - coming out of the Great Depression - while allowing the Allied nations (therefore not Japan or Germany) to purchase military equipment. Meanwhile the U.S. maintained a semblance of neutrality.