The u. s government played role in the building of the transcontinental railroad
a: no
b: a very little
c: somewhat of a
d: a significant

your answer is going to be D.  a significant role.

4 out of 5 of the transcontinental railroad was built with assistance of the government.

the speech convinced americans that the ussr was an enemy, rather than an ally, which led to the creation of the truman doctrine.

the answer is b. they could veto laws. this statement does not describe the members of the roman senate since the praetor urbanus was the one that could veto laws.