Bill and Beth are journalists. In one year Beth can produce 8 business or 20 travel articles, while Bill can produce 1 business or 5 travel articles . The OC of producing 1 travel article is: a. 5 travel article for Bill and 2.5 travel article for Beth b. 0.4 business article for Beth and 2.5 travel article for Beth c. 0.4 business article for Beth and 0.2 travel article for Bill d. 0.4 business article for Bill and 0.2 travel article for Beth e. 2.5 business article for Beth and 0.2 travel article for bill