Line Break after radio button - default template - version 1.2.10

[shawnlg777]

I am using the default template, with version 1.2.10.  I just want to add a line break after each product option.  Each new item with the radio button would have its own line (See Attached)  I tried to make the change in the radio.tpl template and looked for it in the css but didn't see where to make the change.  Any suggestions?

[abolabo]

just put <hr> below line 140 of file storefront/view/default/template/pages/product/product.tpl