There Is/are __________ Level(s)of Biosafety Depending on the Organisms Handled

Question

There is/are __________ level(s)of biosafety depending on the organisms handled.
A)1
B)2
C)3
D)4

Accepted Answer

There are four levels of biosafety, known as BSL-1, BSL-2, BSL-3, and BSL-4, each corresponding to the degree of risk posed by the research and the pathogens handled, with BSL-1 being the lowest and BSL-4 the highest.