Question

One drawback to the use of ultraviolet light as a sterilizing agent is its
A.failure to kill bacteria
B. failure to bacterial spores
C. failure to kill microbes in a closed environment
D. failure to kill microbes located in the center of an object

Answer 1

the answer is failure to kill microbes located in the centre of an object.

Answer 2

failure to kill microbes in a closed environment I think