Answer:
A. The total production of bread and wine rises
Step-by-step explanation:
Note: The question appeared incomplete as neither John's nor Jane's production efficiency is provided. A similar question has been attached for reference purpose upon which this answer is based.
Jane takes 2hrs for making a bottle of wine while John takes 3 hours for preparing a bottle of wine. Hence Jane is more efficient in production of wine than John and if Jane devotes more hours to wine production, the production of wine shall rise.
Similarly, John is more efficient in production of bread as he takes 1 hour for producing a loaf of bread against Jane who takes longer i.e 1.5 hours. Thus, if John devotes more time in preparing bread, the production of bread shall rise.
Hence, the correct answer is (A). The total production of bread and wine each rises.