Table 30-2 Income Level Country A Country B Country C Tax paid Tax paid Tax paid $10,000 $1,000 $1,000 $1,000 $20,000 $2,500 $2,000 $1,500 $40,000 $8,000 $4,000 $2,000 (Table 30-2) A flat tax is in place in O a. Country B only O b. Countries A, B, and C. c. Country A only Od. Country C only