Which answer gives the correct solution and explains how to check if the answer is reasonable? solution: $84 a. explanation: if amy worked the whole day, then she would have made about 6 × $20 or about $120. since amy only worked 2 3  of 6 hr, or 4 hours, she would make about $80 (4 × $20). solution: $252 b. explanation: since amy only worked 2 3  of the day, she earned about 2 × $20 or about $40. since there are 6 hours in the work day, then amy made about 6 × $40 or about $240. solution: $36 c. explanation: since amy only worked 2 3  of the day, she made about 2 × $20 or about $40.