Brian has suffered from severe, unremitting depression for almost two decades. he has tried therapy, numerous psychotropic medications, and ect. nothing has . what is the likelihood that he might respond to deep brain stimulation (dbs)?

Katie and her father are looking at the pipes around their house. they find that some of the pipes have rust on them, making them look and feel different than normal pipes. what kind of change have the rusted pipes gone through? a. a physical change b. a vibration change c. a chemical change d. a temperature change