This method was so easy and so reasonable.A. in a wayB. in the wayC. in this wayD. by the

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(答案→)A. in a way
B. in the way
C. in this way
D. by the way
解析：in a way意为“在某种程度 / 意义上”；in the way意为“妨碍”；in this way意为“以这种方式”；by the way意为“顺便说一下”。