LB'ing, design proposal Show more
Proposal (C): New boost-with-comment button. Your comment shows up in your followers streams, as if it was a boosted reply. A banner or icon tells other people that there's something boosted along with the post. Clicking the post opens the thread view, where your boost-comment is displayed as a reply to the boosted post.
This somewhat mirrors (A) in that people are presented with your words in their timeline first, and have to click to see the content.