Positioning of buttons

[melisa-akan]

Hello,

I am using the canvas-button-response plugin. In some trials, there are 2 buttons and in others, there are four buttons.

For trials with four buttons, I'd like to move the last button underneath the first 3 buttons. I tried adding a <br> to the html variable in the plugin when

trial.choices.length>2  && i == (trial.choices.length-2)

but that didn't work. Any suggestions on how to go about this?

Thank you!
Melisa