I would like brief explanation

The maximum production possible in Rome and in Cathay are as follows: Rome 4\" bread or 20 figs (Q'atlmy 2\" bread or 4\" figs Refer to the information above to answer this question. If each country is selfsufficient (no trade) and each allocates one half of its resources to producing each of the two products, what will be the output in each country? 3;: A) 40 bread and 20 figs in Rome and 20 bread and 40 figs in Cathay. :3. B) 20 bread and 10 figs in Rome and 10 bread and 20 figs in Cathay. C) 0 bread and 20 figs in Rome and 0 bread and 40 figs in Cathay. D) 40 bread and 0 figs in Rome and 20 bread and 0 figs in Cathay