Why do phoebe and prudence treat mrs. winterbottom as if she were invisible on the day of the cheerleading tryouts?

a.
they hear their father come home.

b.
they are thinking only of themselves.

c.
they are ignoring her.

d.
they are arguing.

in the book walk two moons by sharon creech

imparadis't in one anothers arms  

the happier eden, shall enjoy their fill  

of bliss on bliss, while i to hell am thrust,  

where neither joy nor love, but fierce desire,  

among our other torments not the least,  

still unfulfill'd with pain of longing pines;  

yet let me not forget what i have gain'd  

from their own mouths; all is not theirs it seems:  

one fatal tree there stands of knowledge call'd,  

forbidden them to taste: knowledge forbidd'n?  

suspicious, reasonless. why should their lord  

envie them that? can it be sin to know,

send me the article because i do not know wich one it is

i’m not sure but i believe it is true