Rookie Error: Quiz and interactions not working

I'm new to Articulate and starting to struggle a little.

I've created a slide with a question, there are 2 options, each option has a heading and a picture,

I've set a trigger that means the learner click the picture and see a more detailed text summary of the potential answer, as it is script. 

I've selected the pictures as answers in the Pick One form view, so i'd then like them to be able to select the picture they choose to be the right answer, whilst having the text response that matches that picture on screen visible and then they click submit. 

The Pick One quiz seems to have stopped working, I can't see the submit button anywhere on the slide. Is there someone i can talk to about where i'm going wrong? 

thanks 

M