PART B:Which phrase from the paragraph best supports the answer to Part A?
A "It was a terrible blow to him, and for a time he was
quite unnerved"
B "full of elaborate apologies
C "had lost all faith
D "can hardly be got in a pure condition"

< 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⭐

step-by-step explanation:

inverse operation of addition