Can anyone answer number 4 please and explain please really need help with these

Which of teh following would explain the importance of the trans-siberian railroad to russia's economy? (schoology test)

Weathering is an example of an external force of change. question 2 options: true false

In an effort to japan recover from the devastating effects of the 1929 depression, japanese military leaders in the 1930s formed an alliance with nazi germany negotiated more trade treaties with the soviet union closed its doors to western trade adopted a policy of imperialist expansion