One large american food processor raises chickens at its own domestic farms and also obtains about 15% of its chickens (at 20% lower cost) from a large chicken farm oversees. Now a strain of bird flu is spreading across the country oversees. Under what terms should the American food processor now get chickens from oversees?

a. obtain chickens from a farmers' market in that country

b. obtain chickens through a simple contract from the large farm

c. vertically integrate chicken procurement through purchasing the oversees farm

d. horizontally integrate chicken procurement through purchasing the oversees farm