For each question, choose the option that best improves the underlined portion of the sentence:
The research findings not only indicated a correlation but they also suggested a causal relationship.
Show answer & explanation
Correct answer: B
Explanation
Correct Answer: not only indicated a correlation but also suggested
Explanation
• The correlative conjunction not only ... but also must connect parallel grammatical structures.
• In this sentence, the subject (The research findings) governs two past-tense verbs: indicated and suggested.
• Adding the pronoun they creates an unnecessary subject repetition and breaks the parallel flow (not only indicated ... but also suggested).
Quick Tip: Ensure the words immediately following not only and but also share the same grammatical form (Verb + Object / Verb + Object).