Why might understanding multiple grammatical structures be beneficial on the DLAB?

Understanding multiple grammatical structures is crucial for effective language comprehension and application, especially in a test designed to evaluate language aptitude like the DLAB. Mastery of various grammatical constructs enables a test-taker to grasp the intricacies of how different languages are structured, making it easier to identify nuances in meaning and usage.

Grammatical awareness allows individuals to decode unfamiliar sentences and understand the relationships between words and phrases, which is particularly important when processing new languages. This capability is directly tied to the potential for learning and applying new languages quickly and effectively—key skills that the DLAB aims to assess. By recognizing how grammatical elements interact within a given language, test-takers can improve their ability to differentiate between correct and incorrect forms, which is essential for achieving better scores.

Thus, option D represents how deep grammatical knowledge can enhance overall language learning, making it the most beneficial choice in the context of the DLAB.