W3.CSS place buttons at bottom of div

[Geoff]

I have two W3-containers side-by-side. The text in each is of a different length, but the containers correctly display having the same height, with a gap under the shorter text. When I put a W3-button under the text, the buttons follow straight after the text, meaning that the buttons in the two containers are on different levels. I would like both buttions to display at the bottom of the container.

I've looked around and haven't yet found a way to do this with my limited, beginner's understanding. Any ideas would be greatly appreciated.

Here is a link to the page that I'm currently revising. You'll see the uneven buttons in the two large green boxes. http://www.infantmentalhealth.com/test-front-page-3.html

Thanks