Even if the production costs are identical domestically and internationally, a country might still choose to produce boats locally because consumer preferences can differ. What might be considered a desirable design or feature in one country might not resonate with consumers in another. Therefore, local producers can tailor their products specifically to the domestic market, leading to higher demand and potentially better sales.Why other options are incorrect:A) a variation in technical skills from country to country:While technical skill variations can influence production costs and quality, they are not the primary reason for incomplete specialization when production costs are equal. If a country has the technical skills to produce a boat at the same cost as another country, that doesn't necessarily mean it will choose not to produce it locally due to those skills alone.B) a lack of cost-effectiveness in trading some goods such as services:This option is incorrect because the question specifies that the production cost is the same domestically and internationally. If there are additional costs associated with trading (such as transportation or tariffs), those would discourage trade, but they are not the reason for incomplete specialization when production costs are equal.C) transportation costs:Similar to option B, transportation costs can add to the overall cost of importing a finished product. However, if production costs are already equal, transportation costs would only influence the decision if they were significantly higher than the costs of domestic production. Again, this is not the primary reason for incomplete specialization when c