The answer is letter D (risks of secondhand smoke)
Answer:
1. iaconic, wordy
2. help, impediment
3. disassociate, associate
4. low, lofty
5. baffle, enforce
6. license, prohibition
The correct answer is B) because a run-on sentence is a sentence which is incorrectly punctuated. In this case, B doesn't have the right punctuation mark. Instead of a comma (,) perhaps a semicolon (;) should be used.
D. Correct way- On the edge of town the fair is help every year at the park