In a Ricardo-Type Model, If Portuguese Workers Can Produce Three

Multiple Choice

In a Ricardo-type model, if Portuguese workers can produce three times as much wine per Day as English workers but only twice as much cloth per day as English workers, then, if Portuguese wages are 30 euros per day, the upper limit to English wages per day is __________. (Assume 1 euro = £1.)

A) £10
B) £15
C) £60
D) £90