Robert and Jackson both work at an accountant's office. Their major tasks involve responding to client queries through e-mails and preparing financial statements. Robert can respond to 20 emails in an hour or prepare 2 financial statements, whereas Jackson can respond to 35 emails in an hour or prepare 1 financial statement. Which of the following is true? a. The opportunity cost of responding to client queries for Robert is 0.5 financial statements. b. The opportunity cost of responding to client queries for Jackson is 0.2 financial statements. c. Jackson has a lower opportunity cost of replying to client queries than Robert has. d. Robert has a lower opportunity cost of replying to client queries than Jackson has