When using surface disinfectants, one must keep in mind all of the following EXCEPT:

A. Ortho-phthala-dehyde (OPA) is classified as an intermediate level disinfectant and is an alternative to those with glutaraldehyde sensitivities.
B. Glutaraldehyde is classified as a high level disinfectant and can be used as a liquid sterilant with sufficient immersion time.
C. Chlorine dioxide is an effective rapid-acting environmental surface disinfectant (3 minutes) or chemical sterilant (6 hours).
D. Alcohols are not effective in the presence of blood and saliva, evaporate quickly, and are damaging to certain materials such as plastics and vinyl.