Answer:
Option C is correct
Step-by-step explanation:
Given: inequality is 
To find: situation that can be represented by the given inequality
Solution:
Cost of Dunkin Donuts gift card with Daniel = $50
Amount spent by Daniel per day = $3.50
Cost of Dunkin Donuts gift card with David = $100
Amount spent by David per day = $6
Amount left with Daniel after x days = 
Amount left with David after x days = 
According to question,
Amount left with Daniel after x days > Amount left with David after x days

So, he inequality that satisfies the situation is 
Option C is correct