Suppose an individual receives a welfare grant of 200 rials per month and has 160 hours of month. The market wage rate is 1 rial per hour. The implicit tax rate is 100% on earned incom available for this individual? Select one: O a. Pay 100% tax on the grant O b. Collect the welfare grant of 200 rials and do not engage in paid employment. c. Work 160 hours and give up the 200 rials. d. Work 80 hours and collect 200 rials at the same time.