Answer:
D. The workman directed the drivers and us around the road construction.
Explanation:
The list of objective case pronouns includes:
<em>me, him her, it, you, us, them. </em>
In a sentence, they should be used as objects.
Option A uses <em>him</em> as a subject, which is incorrect.
Option B uses <em>her</em> as a subject, which is incorrect.
Option C uses <em>him</em> as a predicate nominative, i.e. a subject complement, which is also incorrect.
Only option D correctly uses an objective case pronoun, us, as an object.