Mr. Zhang bought a new watch and checked it with the wall clock at home. He found that the watch was three minutes slower than the wall clock a day. Later, he proofread the wall clock at home with the standard time of the radio. Min. Zhang, therefore, reasoned that his watch was on time. Which of the following is a correct evaluation of Mr. Zhang's inference? ["Mr. Zhang's inference is correct because the watch is three minutes slower than the wall clock and the wall clock is three minutes faster than the standard time, which shows that the watch is on time.", "Mr. Zhang's inference is wrong because his watch is new.", "Mr. Zhang's inference is correct, because he considered a variety of possibilities.", "Mr. Zhang's inference is wrong, because the wall clock is three minutes faster than the standard time, which is the standard three minutes, and the watch is three minutes slower than the wall clock, which is the non-standard three minutes."]