Doing NC, what if they say Merry Christmas?

Hi,

During NC, suppose your ex sends a Merry Christmas text to you?

It feels if you say nothing back she will think you are whining, pouting, upset or something. So is there a good response to a Merry Christmas text that doesn’t really break the spirit of NC?

Even though it breaks NC, it would be rude not to reply. Say thank you and Merry Christmas to you too. Nothing else is needed…