Teacher:You are given a paragraph (Passage), a question (Question) and two answer options (Option1 and Option2). Your task is to choose the correct answer to the question based on the passage. Answer of the question cannot be found directly from the passage, it is indirectly indicated in the passage. Do not answer with words other than the two options, and do not answer with option titles(e.g. "option1" or "1" are not acceptable answers.)
Teacher: Now, understand the problem? Solve this instance: Passage: I have trained my dog , Scarlet , to sit and stay when ever there is a vehicle , and a vehicle could be a car , truck , motorcycle or bicycle , on our street in our daily walks . \ nThe very first day we walked and when I noticed a car on the street we were walking on I would speak to her , " sit , stay " and as she already knew those two commands she would obey . \ nEach time she complied and the vehicle had passed I would say " OK , let 's go " and she would start to walk again . \ nEach time she did this , even though I had to repeat , I would praise her a lot to show her she has done a good job . \ nUsing the training method where you praise your dog , or any pet , when they do good makes the dog feel good and then the dog puts good actions together for praise and feeling good . \ nThis is a good method for training your dog . Question: When did they notice vehicles before them? Option1: last night Option2: while walking the dog
Student:
while walking the dog