Help me
A
Erin used a dilation, so the segments aren't similar.
B
The segments are congruent, not similar.
C
There is no error. This is a correct conclusion.

I need help

Step-by-step explanation: Help

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐