Which hygiene claim is supported by research? A. There are no benefits to hand washing B. Regular professional teeth cleaning has no effect on dental health C. Brushing with a fluoride toothpaste has no effect on cavities D. Regular hand soap prevents disease just as well as antibacterial soap

Explain why methicillin resistant staphlococcus aureus (mrsa) is more prevalent now than it was only 30 years ago. a. antibiotics cause mutations in staphlococcus aureus that lead to an increase in the number of methicillin-resistant strains. b. methicillin resistance causes an infection to spread more rapidly.c. frequent and inappropriate use of methicillin-type antibiotics has provided selective pressure that has resulted in an increase in the proportion of methicillin-resistant strains of staphlococcus aureus.d. diseases like aids have made people more vulnerable to infections from staphlococcus aureus.