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Mathematics in the senior high school entrance examination is like five questions.
According to the theorem, it's too much trouble to mention it here. ) the answer is B.

Even OD passes through AC and m points.

Because d is the midpoint of arc AC

So OD is perpendicular to AC

So AOM angle = 58

Because AO and DO are radii.

So AO=DO

So the angle Dao = (180-58)/2 = 61.

So the angle DAC=6 1-32=29.