Final answer:
The terms of trade have improved for France and deteriorated for Germany.
Step-by-step explanation:
In this scenario, the terms of trade have improved for France and deteriorated for Germany.
When the price of wine doubles, France, as an exporter of wine, can sell it at a higher price and gain more revenue. This is beneficial for France as it improves their terms of trade.
On the other hand, the price increase in cars (which Germany exports) means that France has to pay more to import cars from Germany. This leads to a deterioration in France's terms of trade.