You should create a new card whenever you find useful information in a source for which you do not yet have a bibliography card, as shown in option A.
A bibliography card must be created whenever the researcher uses information from a research source that has not yet received a bibliography card. This allows all research sources to be recorded, in a way that optimizes the research being carried out.
Learn more about research sources at the link:
https://brainly.com/question/2385191
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