Answer:
Option B. 10 gallons.
Explanation:
Josiah traveled 79.5 miles on 3 gallons of gasoline.
We have to calculate the amount of gasoline he would need to travel 265 miles.
∵ Josiah can travel on 3 gallon of gasoline = 79.5 miles
∴ He can travel on 1 gallon of gasoline =

= 26.5 miles
∴ He would need the amount of gasoline to travel 265 miles =

= 10 gallons
He would need 10 gallons of gasoline to travel 265 miles.