I.Phonetics(5 points)Directions:In each of the following groups of words, there are four underlined letters or letter combinations marked A, B, C and D. Compare the underlined parts and identify the one that is different from the others in pronunciation. Mark your answer by blackening the corresponding letter on the Answer Sheet.1.( )
A、arise
B、brick
C、pride
D、child
Which factor is mainly talked about in Paragraph 2?