Which weapon marked the beginning of modern naval warfare?
A.) The cannon
B.) The ironclad
C.) The rifled gun

  B. The ironclad

Explanation:  

The main battle between ironclads occurred on 9 March 1862, as the defensively covered Monitor was conveyed to shield the Union's wooden armada from the ironclad smash Virginia and Confederate warships. With the clash of Hampton Roads, maritime fighting changed forever. Ironclads were warships intended to be impenetrable to foe shot and shell by the excellence of their iron-shielded wooden structures.

Different names for these boats incorporate rams, defensive layer clads, iron gophers, iron elephants, iron pine boxes, turtle-backs, and mud-smashers. So incredible were the ironclads that they upset an ancient axiom of naval warfare that forts were stronger than ships.

what are the choices btw if it was me id say the lack of money to continue with education

more than 65,000 union soldiers had been killed that summer.

more than 65,000 union soldiers had been killed that summer.

more than 65, is the correct