Answer:
C) a magazine article reviewing the previous findings of the CDC on asthma patients.
Step-by-step explanation:
The secondary source refers to a document or article that is written by someone who did not have experience first-hand or are part or have a role in the events or conditions connected to the theme of researching.
In this list of sources, the magazine article is reviewing the previous findings, it is not using new research or include an experiment or any type of relevant information connected to the topics of Patricia's researching.