During the civil war, the capture of fort henry and fort donelson the union to control?

The capture of Fort Henry and Fort Donelson enabled the Union to gain access to and control the Tennessee and Cumberland Rivers. This provided a Union invasion path to Tennessee and on through the rest of the South. This made the forts very attractive targets for Union forces. 

I'm not 100 percent sure i say 7 is your answers

Choices? im thinking spain but with no choices its a bit vague