Answer:
I think it's "As the two climbed into the ring, the crowd exploded with a roar. Antonio and Felix both bowed gracefully and then raised their arms in acknowledgement"
Explanation:
it's right before the big fight starts, and the tension is starting to grow between the two.
I think the answer is d. Not sure if wrong, sorry.
The root word is movable because it can stand on it's on as a word, while "im" can not.