Your instructor wants you to bring in an example of a biofilm to your lab. Which choice is the best selection for bringing in an intact biofilm for further study?
A.
Disconnecting and bringing in the old, mildewed showerhead from the showers in your dorm
B.
Scraping the mold off of the shower curtain in your dorm's bathroom into a paper cup using a butter knife
C.
Using a toothpick to scrape plaque off of your teeth and smearing it onto a slide to bring in to lab
D.
Wiping a sponge across a slimy boulder in a stream in a nearby park and bringing it in to lab
A
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