But text inside QUOTE tags is not shown in the activity stream! So, you can put the answer in QUOTE tags, and then put COLOR tags around the quoted answer so that it matches the pale-blue background of quoted text. For example:
"What's black and white and red all over?"
Traditional answer:
1. A newspaper (it's "read" all over)
Alternate answers:
2. A Communist zebra
3. A skunk in tomato sauce
4. A blushing penguin
5. A Catholic nun having her monthly "period"