Speculation and restrict in a sentence

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.

Voice is the varying of pitch when speaking.

Langston hughes's poem "madam and the rent man" reflects its historical setting because madam's apartment is in a serious state of disrepair and the landlord will not fix it. madam is at the mercy of a rent man who does not care and takes advantage of her. madam's words show her frustration about being treated unfairly and her determination to fight for what is right. madam does not feel that she has the power to stand up for herself when confronted by the rent man.