Hey umm I hope this helps
encantan would be the correct answer
Answer:
I think its A or D but I'm not totally sure which one.
Explanation:
The only difference I can see between A and D is if its the last day of the year or the first of the year. I would think it is A, becuase it is going into the New Year, but I am not completely sure.
Answer:
It is used to change light levels for test tubes to see how the substance or organizim reacts, and to stop things from messing with your experiment. (And to keep dust off of your test tube rack.)