Transitions may be mechanical, but they foster coherence. The expression is competent. Sentence structure is generally correct, although it may show limited competence with such elements as subordination, emphasis, sentence variety, sentence length, and modifiers. It relies instead on simple and compound sentences. The paper is generally free of comma splices, unintentional fragments, and fused sentences.
Word choice is correct though limited.
It may contain errors in spelling, mechanics, and grammar. Papers A D paper attempts to follow the assignment, even if the choice of topic or situation is poor, whether too broad, too narrow, or inappropriate. A D paper often shows a poor sense of audience and purpose. Or it may correctly assess the situation, but add little of substance to it. Necessary evidence may be missing, irrelevant evidence present, or the interpretation or evaluation of that evidence may be inadequate.