Answer:
Option B.
Explanation:
Let d represent the number of days for Starlin's trip.
It is given that Starlin's spend $25 on gas for his car and $100 each day on other expenses.
Total expenses of d days = 25 + 100d
If is given that Starlin's goal is to spend less than $415 on a trip. It means total expenses is less that $415.

Subtract 25 on both sides.


Divide both sides by 100.

Starlin's trip must last fewer than 4 days. Therefore, the correct option is B.