With . . . . . . . . united effort, I achieve it. A. a B. an C. the D. no article

The correct answer is: D. no article

The sentence “With united effort, I achieve it” is a general statement about the importance of teamwork. It does not refer to a specific united effort, so it does not require an article.

The other options are incorrect because they are all articles. An article is a word that is used to modify a noun. In

this case, the noun is “united effort.” The articles “a” and “an” are used before singular nouns that begin with a consonant sound. The article “the” is used before singular nouns that are specific or unique. In this sentence, the united effort is not specific or unique, so it does not require an article.