The correct answer is D. no article.
The word "almighty" is a noun that means "all-powerful." It is a proper noun, which means it refers to a specific person or thing. In this case, it refers to God. Proper nouns are not preceded by articles.
The other options are incorrect because they are articles. Articles are words that are used to modify nouns. They can be used to indicate whether a noun is specific or general, and they can also be used to indicate the number of nouns. In this case, the noun "almighty" is specific and singular, so it does not need an article.
