A．Because it is easier for the parents to do so.B．Because the teachers may not permit
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A．Because it is easier for the parents to do so.
B．Because the teachers may not permit the later solution.
C．Because children may prefer it.
D．Because it will give children a chance for doing something challenging.
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正确答案：D
解析：选项和原因有关。本题是因果题。从will suggest the general procedure and let the child work out the particular solution；可以推断出原因。