Which description matches the characteristics of clinical depression?

a disorder characterized by uncontrolled eating binges followed by purging
a disorder characterized by feelings of elation and boundless energy
a disorder characterized by feelings of sadness and hopelessness, and the inability to enjoy usual activities
a disorder characterized by the display of rigid behavior patterns that make it hard for a person to interact with others

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.