Answer:
A. As a result of the professors activities, import would increase while export remains unchanged. Net export would reduce.
B. Export would increase while import remains unchanged. Net import would increase
C. Volvos are made in Sweden. So, the Volvo would be imported. This increases import and export remains unchanged. Net export would reduce.
D. The sales takes place in England, so US export, import and net export would remain unchanged.
E. Export would increase while import remains unchanged. Net import would increase
Explanation:
Net export = Export - Import