Unfortunately, doopoll doesn't have an out of the box way for you to do this.
However, one thing that has worked for many customers is creating a new image file, with all of the images combined and assign each it's own number.
You can use something like Canva/Photoshop to do this. You could add this to the question on doopoll and list the numbers as the options, letting people choose which one they like.
Users will be able to click the photo to enlarge / zoom in.