Answer:
The correct answer I believe is B
Explanation:
Team A has 4 runners; each runs 1/2 of a mile. So, that's 1/2+1/2+1/2+1/2, which is the same thing as 2 miles. You can now rule out A and D.
Team B has 6 runners, each running 1/2 a mile. In total, team B has run 3 miles (6 x 1/2=3). Now, you are only left with answer choice B.
Team C has 8 runners, and each runner also jogs half a mile. So, the team as a whole has jogged 4 miles. Thus option B is correct
hope this helps :)