To answer this question, you need to be aware of the dairy production in Northern Europe.
Option A) Denmark - This option is correct because Denmark is known for its dairy production and is considered one of the major dairy-producing countries in Northern Europe.
Option B) Norway - This option is incorrect because Norway is not primarily known for its dairy production. It focuses more on other industries such as oil and gas.
Option C) Sweden - This option is incorrect because while Sweden does have some dairy production, it is not as significant as in Denmark.
Option D) Portugal - This option is incorrect because Portugal is not located in Northern Europe. It is situated in the southwestern part of Europe.
The correct answer is A) Denmark. Denmark is known for its dairy production in Northern Europe.