3 Select the correct answer. Given: TAOB is a right angle Prove: m $ BOC = 90 B Since AOB is a right angle, it is 90. AOB is supplementary to BOC, so m & AOB + m & BOC = 180 . By the substitution property of equality, 90 + m BOC = 180 . Applying the subtraction property of equality, m & BOC = 90. What statement is missing from the proof? O A. TAOB and DOC are vertical angles. O B. AOB and BOC form a linear pair. O c. COD and AOD form a linear pair. O D. DOA and BOC are vertical angles