After teaching a group of students about the types of urinary incontinence and possible causes, the instructor determines that the student have understood the material when they identify which of the following as a cause of stress incontinence?
a. obstruction due to fecal impaction or enlarged prostate
b. bladder irritation related to urinary tract infections
c. increased urine production due to metabolic conditions
d. decreased pelvic muscle tone due to multiple pregnancies

for me i have felt invisible when i was clearly struggling,or,i made a great achievement ,and,nobody took to notice me either because they just didn't see it,or,people just turned their back on me.i can see a person being invisible by choice,or,without choice like i did.the people who are invisible by choice don't try to talk to people,don't try to make friends,and,keep to themselves.i haven't been one of those people so i couldn't give you a reason.

hope this and can i get bainliest my dude : d