It was . . . . . . . . easy job. A. a B. an C. the D. no article

In this case, the speaker is not referring to a specific job, but rather to the general concept of a job. Therefore, the article “a” or “an” would not be appropriate.

The article “the” would also be incorrect, because it is used to refer to specific, unique things. In this case, the speaker is not referring to a specific job, so the article “the” would not be appropriate.

Therefore, the correct answer is D. no article.