A student involved in a citizen science projects is supposed to count passing cars at a particular intersection over exactly 30 min. While he is counting cars, he receives a phone call and gets distracted. He records the number of cars he counted up until that point. What common error which is a caution for citizen science projects did he commit? Group of answer choices He did not make any mistakes. He breached the protocol. He recruited unqualified counters. He became distracted while he was supposed to be concentrating. He recorded the wrong number. He should have estimated more cars depending on the minutes left in his observation