hi!

I think the answer key is wrong, if D) is the answer we would start with 100% dead cells and then 60 mins later 100% are brought back to life…

For me C) is the best option, we start with 100% colourless alive cells

X is the higher temperature because it will kill the yeast much faster so the slope is on a sharper decline

What do you think? My reasoning might be flawed

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That makes sense!Thanks.