C is correct i believe. its not A because that could not be a sentance byitself, not b because im sure you know why and d might be but then the teacher would be trying to explain to you something other then the rules of punctuation
Life is like riding a bicycle. To keep your balance you must keep moving.
Answer:
Codon use within the genome is biased and unusually distinct from its host.
If you have to much food or if your young
No, otherwise it would not be an opinion. you can turn a
hypothesis into factual info by carrying out an experiment.