With english homework i’m a proper noun so i need a definition about me

Which of the following statement about groups is likely false? a.)you can be part of one and not know it.b.)interdependence can lead to frustration.c.)there is usually a common purpose. d.)structure tends to exist within them.

47. a student is frightened by a loud noise, which results in a hormone being released into the blood. the hormone causes the student's heart to beat rapidly. the two systems that work together to cause this reaction are the endo- crine system that secretes the hormone and the (1) nervous system (3) excretory system (2) reproductive system (4) digestive system

Rewrite the passage to improve expression.