OG的解释如下: reasoning: the information that strengthens this argument iwill be about the subjects of the argument, not about tangential issues. in this case, the argument is about early hominid's use of fire. any physical evidence that links the early hominids to the charred bone fragments strengthens the argument. if these bone fragments where found in conjunction with some other evidence of the presence of early hoominids, then that evidence from the swartkans location could be used to support the claim that early hominids used fire. d. the fragments date back one million years, so evidence from 500,000 years ago is irrelevant. e. correct. this statement properly identifies evidence that links early hominids to these bone fragments and so strengthens the argument. 还是不懂啊. 为啥使用工具和用火有联系呢.... | 
