How did the tripartite pact of 1940 impact alliances in WWII?

A. it led to japan to join forces with the united states
B. it created the axis powers alliance in 1940
C. it allowed the united states to lend and lease equipment to the allied powers
D. it led the soviet union to join the war

B. it created the axis powers alliance in 1940

The Tripartite Pact of 1940 created the Axis Powers alliance between Germany, Italy, and Japan, which impacted alliances in WWII by solidifying these countries' cooperation and coordination in the war.