The correct answer is A) countries in dark blue.
<em>According to the map, the countries considered highly developed are the countries in dark blue.</em>
The countries colored in dark blue have the highest Gross Domestic Product (GDP), which mean it is the sum of the market values, prices, and products and services produced in a specific country in one year.
As we see on the map, the most high-developed countries of the world are the United States, Australia, Canada, Great Britain, France, Germany, Switzerland, Norway, Denmark, Sweeden, the Arab Emirates, Japan, and New Zeland.