Three bond angles are marked on the molecule shown. What is the descending order of the bond angles $x$, $y$ and $z$, from largest to smallest?
- A$x \rightarrow y \rightarrow z$
- B$x \rightarrow z \rightarrow y$
- C$y \rightarrow z \rightarrow x$
- D$z \rightarrow y \rightarrow x$