To reduce the risks of cross contamination when performing cpr, we should try, as far as possible, and if conditions permit, practice cpr in a clean environment of any chemical or physical waste, that the person who is performing the procedure doesn´t have any respiratory disease that can make the situation worse, having clean hands not to contaminate the patient, keep other people away so fresh air can flow freely.
A change in DNA could result in a changed sequence by the amount of atoms and chemicals in the DNA
A swarm of locusts would negatively affect an environment, due to the fact that they would consume a large amount of vegetation.<span />
Answer:my guess is C or D
sorry if im wrong on both of them