Xiao Li 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 checked the wall clock at home with the standard time of the radio and found that the wall clock was three times faster than the standard time of the radio. Min. Xiao Li therefore concluded that his watch was on time. Which of the following is a correct evaluation of Xiao Li's inference? ? ["Xiao Li's inference is correct because his watch is new.", "Xiao Li'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 indicates that the watch is on time.", "Xiao Li's inference cannot be judged to be correct or wrong.", "Xiao Li's inference is wrong, because the wall clock is three minutes faster than the standard time, it is the standard three minutes, and the watch is three minutes slower than the wall clock, which is not equivalent."]