对应选项为：A
43题对应段落主体来源于段落前两句,动作来源于段落尾句：Plagiarism by accident, or oversight，sometimes is the result of the writer’s inability to decide or remember where the idea came from….Although this type of plagiarism must be guarded against, it is the least serious and, if lessons learned, can be exempt from being severely punished.
主体名词为：plagiarism
对应动作为：by accident “意外”, is the result of the writer’s inability“是作者无能的结果”, be guarded against “
