The correct answer is D. no article.
The word "Germany" is a proper noun, which means it names a specific place. Proper nouns are not preceded by articles.
The other options are incorrect because they are all articles. Articles are words that are used to modify nouns. They can be used to indicate whether the noun is specific or general, singular or plural, and countable or uncountable.
In this case, the noun "Germany" is specific, singular, and countable. Therefore, it does not need an article.
