Board Thread:Support Requests - Getting Technical/@comment-30142719-20170802104434/@comment-27345308-20170802113141

That is not their question. Their question is how to make a poll in which you can select multiple options.

You can try embedding a Google Form with  tag. For example,  results in what you can see on here.

I remember there being multiple other poll integrations, but I didn't get too much into how to use them.