A student wanted to incubate a specimen on solid media held at three temperatures: 22°C, 50°C, and 75°C. Would agar be a good choice for him to use as a solidifying agent?
a. No, because although solid agar would remain solid at 22°C, it would be liquid at 75°C.
b. No, because although solid agar would remain solid at 22°C and 50°C, it would be liquid at 75°C.
c. Yes, because solid agar would remain solid at all three temperatures.