|Question 11Verbal

Source Texts

Text
Because humans occupy the International Space Station (ISS), it also harbors common dust-borne fungi and bacteria found on Earth. In a study of dust collected from the ISS, the growth of fungi like Penicillium chrysogenum and bacteria like Staphylococcus pettenkoferi was acceptably low under the station's standard relative humidity (RH) conditions but unacceptably high at RH of 85% and above, which could feasibly happen in station areas where crew members exercise.
Which statement about microbial growth aboard the ISS is best supported by the text?
The growth rates of both P. chrysogenum and S. pettenkoferi increased gradually when RH increased incrementally from 25% to 75%.
A
Neither P. chrysogenum nor S. pettenkoferi is likely to grow when RH is kept below 25%.
B
Under normal operating conditions, there should be no microbial growth in dust on board the ISS.
C
Undesirable microbial growth in dust likely occurs in some locations on board the ISS.
D