(01.07 mc) lines bc and ed are parallel. they are intersected by transversal ae, in which point b lies between points and e. they are also intersected by transversal ec. angle abc measures 70 degrees. angle ced measures 30 degrees. given: line bc is parallel to line ed m∠abc = 70° m∠ced = 30° prove: m∠bec = 40° statement justification line bc is parallel to line ed given m∠abc = 70° given m∠ced = 30° given m∠bec + m∠ced = m∠bed angle addition postulate m∠bec + 30° = 70° substitution property of equality m∠bec = 40° subtraction property of equality which of the following accurately completes the missing statement and justification of the two-column proof? m∠abc = m∠ced; corresponding angles theorem m∠abc = m∠ced; alternate interior angles theorem m∠abc = m∠bed; corresponding angles theorem m∠abc = m∠bed; alternate interior angles theorem