Answer:
B) Ms. Humphrey turned left, she yielded to oncoming traffic.
Explanation:
Each phrase on either side of the comma are full sentences, with no connecting word between them
Hope this helps!
The form of the word "tough" that best completes the sentence is option B. toughest. So the complete sentence would be: What was the toughest game you have competed in? When we add the suffix -est at the end of the base form of an adjective word, it means it is comparing in a superlative degree.