Final answer:
The correct statement regarding Scandinavian countries is d) They have high levels of social welfare and equality. While they do have similar forms of government and some participation in the EU, not all are EU members and they each have distinct official languages.
Step-by-step explanation:
Among the options presented, the statement that is true regarding the Scandinavian countries such as Finland, Norway, Denmark, and Sweden is: d) They have high levels of social welfare and equality. These nations are noted for their strong egalitarian ideals, leading to extensive advancements in free medical care, education, and social services for everyone.
Norway, Sweden, and Denmark share a similar form of government, being constitutional monarchies with parliamentary systems, while Finland is a parliamentary republic, which is still a democratic form of government but with a president in place of a monarch. Although their governments are indeed similar, the options do not clearly specify the nature of this similarity, making choice c) less directly accurate. Regarding memberships in the European Union, Finland, Sweden, and Denmark are EU members, but Norway has opted not to join, primarily due to its economic and energy independence. This fact makes option b) incorrect. When it comes to language, each country has its own official language, making option a) incorrect as well.