Based on the information in this graph, the speed of railroad construction between 1840 and 1850.

If you look at my test it has all the correct answers. I got the middle one wrong but it shows that its right.

Explanation:

lee and grant, both of whom held the highest rank in their respective armies, had known each other slightly during the mexican-american war (1846-48) and began their dialogue by exchanging awkward personal inquiries. characteristically, grant had arrived in his mud-splattered field uniform while lee had turned out in full dress attire, complete with sash and sword.

explanation:

the answer is a. harriet tubman was a nurse on the battlefield.