which of the following dresses would you say are the most suitable for a work end of year party?

The black and white skater dress, because it isn't slinky.

You NEVER want to wear anything suggestive to a work function, no matter how much fun they say you will have. You will ruin your professional relationships with coworkers and management, and undermine any respect you have built up in a heartbeat.

Can you say "sexual harassment"?

Treat this as a work meeting, be pleasant, but dress respectably.

You do NOT want everyone there daydreaming about you as a party girl, so don't dress like one. You can wear whatever you want, so long as it's on your own time- this is work.

Last one is real classy

i personally like the first one and the last one, i would wear the last one because its more my style but its all about personal preference, and where you work :)