Answer C, I think. Hope to help :)
<u>Cellular respiration</u> is the process by which cells in plants and animals break down sugar and turn it into energy, which is then used to perform work at the cellular level.
Explanation: In simpler words, it provides energy for the cell to do basic needs.
C. their DNA is very different
If a set of data is highly precise, it generally "indicates that the data must have a high level of accuracy" although there can be other crucial factors affecting the data as well.