B
The following card includes a brief summary and a short assessment of a research paper. It can provide a guide for further reading on the topic.
【題組】70. (A)is mentioned in the card, the limitation of the research paper mainly lies in that .
(A)the data analysis is hardly reliable
(B) the research sample is not wide enough
(C) the findings are of no practical value
(D)the research method is out-of-date