Mateo teaches a continuing education class at the library on Tuesday nights He estimates that 75 of his students are satisfied or very satisfied with the class Last week he asked a random sample of students to take a survey on their experience in the class However the results showed that only 70 indicated that they are satisfied or very satisfied with the class He decides to randomly survey more of his students How will Mateo know whether his model is valid or not O A It is valid if the result from all the surveys and the model get farther apart O B It is valid if the result from all the surveys and the model stay the same It is impossible to determine whether the model is valid It is valid if the result from all the surveys and the model get closer together OC O D