Solved Am I right with dahlia

My daughter has started a college course for flower arrangement, she's done a posy but doesn't remember what the flowers are , am I right in thinking this is a dahlia?

 

I'm erring on chrysanthemum, but could be wrong.

 

I would agree with @pete because I don't think you'd get dahlias now - even if imported. It looks more 'full' than a dahlia. Stem will tell you - if hard and wiry it's a chrysanth, if fleshy and hollow it's a dahlia

 

Thanks @CarolineL for the tip, I'll have a pick at when it starts dying off, looks to good at the moment.