Based on its structure, which word most likely means "someone who takes advantage of circumstances”? credulous disdainful proactive opportunistic

Read the following argument: it has been documented that therapy dogs relieve stress and provide health benefits for patients in hospitals and nursing homes. which of the following statements offers the most relevant evidence to support this argument? a. increasing pet visitation has caused interruptions to the work of nurses because they want to see the pets too. b. interaction with pets can reduce a patient's pain, lower blood pressure, and increase communication. c. pets can disrupt schedules and prevent patients from going to their program of physical therapy. d. pets in hospitals may provide entertainment, but they also may bring diseases with them.