List the BSL (Biosafety Level) that SARS-CoV-2 would be placed in, and why? 
a) BSL-1; because it poses minimal risk to laboratory personnel and the environment. 
b) BSL-2; because it is a moderate-risk agent that can cause human disease. 
c) BSL-3; because it is a pathogen that can cause serious or potentially lethal disease through inhalation. 
d) BSL-4; because it is a dangerous pathogen that poses a high risk of aerosol-transmitted infection.