Lines AD and EC meet at point B. Which of the following statements must be true? Select All that apply.

The angles produced are vertically opposite angles, thus opposite angles are congruent. The applicable statements are; A, B, C and D.
Lines AD and EC meeting at point B produces set of angles that are congruent (by vertical opposite property).
Now considering the given diagram, it can be observed that the following statements are applicable: A, B, C and D.
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