How did President Truman use the policy of containment in Iran and Turkey?

Which fact would this be, and how might you verify the truth?

Which answer best describes an advantage of shipping goods by canal? a) most towns would rather have canals then noisy railroads b) goods could travel very fast downstream in the canal system c) traveling by boat is a much more relaxing way to transport goods. d) heavy loads of goods could travel by boat more easily then if pulled by horses.

What are the 6 steps in the scientific method