Final answer:
Toyota is advised to increase its advertising budget in Germany for the Lexus brand, as it provides a safer approach to gain market share compared to making significant product adaptations which have uncertain cost and sales implications.
Step-by-step explanation:
In considering the strategy Toyota should adopt to gain market share in Germany, specifically for its Lexus brand, increasing the advertising budget in Germany (choice D) is the advised approach over making significant product adaptations (choice B). The rationale behind this suggestion lies in the lack of data concerning cost implications and sales volume associated with making significant product changes. It is difficult to ascertain the profitability and financial viability of choice B without knowledge of Toyota's cost structure and the market demand for adapted vehicles. Conversely, increasing the advertising budget aims to raise brand awareness and influence consumer perception, potentially leading to increased sales and market share without the risks and outlay associated with altering the vehicles themselves.
Moreover, contrasting this with a different economic strategy related to production specialization between countries, such as that outlined for Germany and Poland in production of video cameras and televisions respectively, shows that the focus in the case of Toyota is brand visibility and market growth through marketing efforts rather than production changes or specialization.