D because at the time, the war was over with haha
Answer:
D. By adding the vectors

Explanation:
Given
Represent the velocity of the river current as VR

Represent the velocity of the boat as VB

Required
How to calculate the velocity of boat relative to river current
From the question, we understand that both move in the same direction.
So, the relative velocity V is calculated as:



Notice that the both velocities are added together to get the relative velocities.
This is so because they both move in the same direction
<em>From the list of given options, only option D is correct.</em>
The correct answer is B. Counties often manage institutions and services like jails, libraries, and courts.<span>The county commissions, county court, county legislature county executive or county administrators usually oversee the day-to-day operations of the county government. They are in charge of running various institutions including the jails and courts.</span>