Final answer:
Tests like EIA, RT-PCR, and PCR can all detect specific viruses, making D. all of the above the correct answer. Filtration is the microbial control method that physically removes microbes, correctly answered by A. filtration.
Step-by-step explanation:
The tests that can be used to detect the presence of a specific virus include Enzyme Immunoassay (EIA), Reverse Transcription Polymerase Chain Reaction (RT-PCR), and Polymerase Chain Reaction (PCR). Therefore, the correct answer is D. all of the above. These methods are applied to identify and quantify viruses by targeting unique sequences of viral RNA or DNA, with RT-PCR additionally being able to convert RNA into DNA.
As for the microbial control methods, filtration is a process that physically removes microbes from samples without necessarily killing them or inhibiting their growth, unlike desiccation, lyophilization, or nonionizing radiation, which aim to destroy or deactivate microbes. Hence, the correct answer is A. filtration.