If your good in english

“the miner had abandoned everything to go mining for emeralds. for five years he had been working a certain river, and had examined hundreds of thousands of stones looking for an emerald. the miner was about to give it all up, right at the point when, if he were to examine just one more stone—just one more—he would find his emerald. since the miner had sacrificed everything to his personal legend, the old man decided to become involved. he transformed himself into a stone that rolled up to the miner’s foot. the miner, with all the anger and frustration of his five fruitless years, picked up the stone and threw it aside. but he had thrown it with such force that it broke the stone it fell upon, and there, embedded in the broken stone, was the most beautiful emerald in the world.”

the old man transformed himself into a stone. this part of the plot represents the of the story

a. exposition
b. denouement
c. climax
d. rising action

i going with climax but then again i wanna say rising action