The correct answer is A. Infrastructure projects such as roads and canals
Step-by-step explanation:
The term "internal improvements" is mainly used to refer to infrastructure projects related to transportation. This term emerged in the United States after Independence and was used until the 19th century. Additionally, the internal improvements were related to the importance of improving transportation to increase trade and connect all the settlements in the U.S.
According to this, the one that is an example of internal improvements is "Infrastructure projects such as roads and canals" because this focuses on transportation infrastructure which is exactly what internal improvements were about. Also, one of the key points in internal improvements was roads and canals as these were necessary for trade and connection.