Correct answer choice is:
A.It hindered Japan's ability to wage war.
____________________________________________________________
Step-by-step explanation:
Reacting to the Japanese invasion of essential airfields in Indochina (July 24) following an exchange between Japan and Vichy France, the U.S. suspended Japanese economic resources on July 26, 1941, and on August 1 authorized an embargo on petroleum and propellant exportation to Japan.