~~Hello~~
The answer to your question is B.
<em><u>A federal license allowed Thomas Gibbons to operate his steamboats in multiple states.</u></em>
Hope this helps!
Lowering tax rates on the highest income earners will have money trickle down to those in the lower tax brackets.
The improvement that led to city limits being expanded was the <u>A. Streetcar system. </u>
<h3>What were the benefits of the streetcar system?</h3>
- It allowed for people to travel great distances cheaper.
- It could carry a lot of people at a time.
This allowed for people to love out of the city and settle in outlying areas knowing that getting into the city wouldn't be difficult and thereby fueling growth.
In conclusion, option A is correct.
Find out more on transportation systems at brainly.com/question/12243237.