Answer:
I think its A
Explanation:
Sound dental sterilization practices in dentistry protect patients, dentists and the whole team. They prevent the growth of bacteria on instruments and surfaces throughout the dental practice. Microorganisms in blood and saliva can carry bacteria and diseases like hepatitis, herpes, tuberculosis, staph and strep.
This is confirmed to be True.
Birth defects can be caused wither by internal genetic factors or external factors like drugs, radiation, smoking,...
Dana, who is concerned about the possibility that her baby will have defects, may do the following tests: screening test, that will show if she might have child with birth defect and diagnostic test like amniocentesis (analyzing small amount of amniotic fluid from the area surrounding the baby) which is more than 90% correct.
