Respuesta :
Answer:
I think C. Petri dishes
Explanation:
"The most common growth media nutrient broths (liquid nutrient medium) or LB medium (Lysogeny Broth) are liquid. These are often mixed with agar and poured into Petri dishes to solidify. These agar plates provide a solid medium on which microbes may be cultured."-https://courses.lumenlearning.com/boundless-microbiology/chapter/culturing-bacteria/
I hope this helps!
i believe the answer is C because whenever someone tests something for bacteria, they take the swab and rub it on a petri dish.