Final answer:
The most authoritative source of information on the proper use of appropriated funds can be found at the Center on Budget and Policy Priorities (CBPP) website. Another reputable source is the Consumer Reports website.
Step-by-step explanation:
The most authoritative source of information on the proper use of appropriated funds can be found at the Center on Budget and Policy Priorities (CBPP) website. The CBPP provides policy analysis and research on various budget and policy issues, including the allocation and utilization of federal tax dollars.
Their website offers comprehensive reports and articles that outline how federal tax dollars are spent and provide insights into the proper use of appropriated funds. Another reputable source of information is the Consumer Reports website, which provides consumer-oriented information on various topics, including government spending and policies.