单项选择题

Choose the function of the following sentence:
However, pups from the females fed with the GM soya flour supplemented diet kept dying during lactation period as it is evident from Table 3.
A、Establishing the specific topic and providing the relevant background information
B、Stating the purpose of the present study
C、Describing the previous studies on the topic
D、Stating the results of the present study
E、Introducing the present research methods

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