Which statements must be true? Select each correct answer.

AB⎯⎯⎯⎯⎯∥XZ⎯⎯⎯⎯⎯
CB=BA
CB⎯⎯⎯⎯⎯∥XY⎯⎯⎯⎯⎯
XY=2CA
CA=12YZ

The figure shows what appears to be acute triangle X Y Z. Point A is on side X Y. Single tick marks pass through segments X A and A Y. Point B is on side Y Z. Double tick marks pass through segments Y B and B Z. Point C is on side Z X. Triple tick marks pass through segments Z C and C X. Segments A B, B C, and C A are drawn.