James previously worked as a waiter that gave him a budget of $10 per week to spend on either chocolates or ice cream, both of which cost him $2.5 each. At those prices, James ate equal amounts of chocolate bars and ice cream. James now switches his job to work at the ice cream shop, which allows him to spend $7 on chocolates and ice cream per week. But as an employee benefit, he only has to pay $1 for ice cream.

What is the effect of switching jobs on James's welfare?

a. the effect on james's welfare cannot be determined from given information

b. james welfare is unaffected

c. james welfare is harmed

d. james's welare is improved