Complete the following sentence using the most appropriate words. Annie is a forensic scientist. As a part of the investigations of a recent case, she extracted DNA from bloodstained clothes of the victim. She completed the analysis, but her superior felt that they would need to preserve the DNA sample for the future, which could be many years.

So, Annie should store the extracted DNA sample in A. Ethinal at A. -80°C.
B. Buffer B. 4°C
C. Water C. -20°C