D is correct answer......
Answer:
The different types of face masks include:
Basic cloth face mask
Surgical face mask
N95 respirator
Filtering facepiece respirator
P100 respirator/gas mask
Self-contained breathing apparatus
Full face respirator
Full length face shield
KN95 respirator
Pretty sure it is pathogens including bacteria, viruses and protozoans. its not the first and last for sure
