What is the correct definition of an opportunity cost

What two bodies of water were connected by the panama canal

Need will give brainliest which of the following was the most significant aspect of revel's election to the senate?

Germany italy and japan formed the tripartite pact in part because they: a. hoped to convince the united states to stay out of world war ii b. share the ruling philosophies based on communist economics c. resented the agreements they were forced to sign at the munich conference d. believed their territories were threatened by aggressive foreign states