You will be given a definition of a task first, then some input of the task.
You are given a paragraph (Passage), a question (Question) and two answer options (Option1 and Option2). Your task is to find the correct answer (and return the string of the correct option, not option1/2) for the given question from the given options and based on the given passage. Answer of the question can be found directly from the passage.

Passage: I have an important test coming up . So , I 've been studying a lot lately . I was studying at the library last night . I set aside four hours to study . I tried to keep my mind off of it , but my hunger was distracting me from my work . So , I decided to grab something from the vending machine . I stopped studying , and I want to the lounge area of the library . I was surprised by all the great options available . I could choose both hot and cold items . There were also ice cream sandwiches . I love those frozen treats . I decided , however , just to get some pretzels . There were codes for each item available . I entered the code for pretzels into the computer on the side of the machine . And , my pretzels dropped into the bay at the bottom of the machine . I ate them quickly . They were delicious . I then returned to my homework . Question: When did the stomach rumbling start? Option1: during studying Option2: during the test
Output:
during studying