Suppose that a worker in freedonia can produce either 6 units of corn or 2 units of wheat per year, and a worker in sylvania can produce either 2 units of corn or 6 units of wheat per year. each nation has 10 workers. without trade, freedonia produces and consumes 30 units of corn and 10 units of wheat per year. sylvania produces and consumes 10 units of corn and 30 units of wheat. suppose that trade is then initiated between the two countries, and freedonia sends 30 units of corn to sylvania in exchange for 30 units of wheat. freedonia will now be able to consume a maximum ofa. 30 units of corn and 30 units of wheat.
b. 40 units of corn and 30 units of wheat.
c. 40 units of corn and 20 units of wheat.
d. 10 units of corn and 40 units of wheat.

Which of the following methods could be considered a "best practice" in terms of informing respondents how their answers to an on-line survey about personal information will be protected? respondents are informed that investigators will try to keep their participation confidential; however, confidentiality cannot be assured.respondents are informed that a research assistant will transfer all the research data to a password-protected computer that is not connected to the internet, via a usb flashdrive. the computer is located in a research team member's office.the investigator uses the informed consent process to explain her institution's method for guaranteeing absolute confidentiality of research data.the investigator uses the informed consent process to explain how respondent data will be transmitted from the website to his encrypted database without ever recording respondents' ip addresses, but explains that on the internet confidentiality cannot be absolutely guaranteed.the investigator uses the informed consent process to explain how respondent data will be transmitted from the website to his encrypted database without ever recording respondents' ip addresses, but explains that on the internet confidentiality cannot be absolutely guaranteed