The correct answer is B. I called for Sadie. Sadie didn't answer. I waited up for Sadie didn't come home.
Explanation:
Parallel constructions involve the repetition of a grammatical pattern including the use of the same tense or grammatical form to express elements of the same importance. This structure is used in the sentence "I called for Sadie. Sadie didn't answer. I waited up for Sadie didn't come home" because in this sentence all the actions are expressed using the simple past tense through verbs such as called, waited, or didn't answer. Moreover, this structure helps the author create a sad tone because all the actions expressed the idea Sadie cannot be found.
D. Henry Ford adapted the assembly line, an innovation in factory production, to produce cars.
