CRC 3.1320(j) states;Time to respond after demurrer
Unless otherwise ordered, defendant has 10 days to answer or otherwise plead to the complaint or the remaining causes of action following:
(1)The overruling of the demurrer;
(2)The expiration of the time to amend if the demurrer was sustained with leave to amend; or
(3)The sustaining of the demurrer if the demurrer was sustained without leave to amend.
If any causes of action were not demurred to, or any causes of action survived the demurrer, you would have to answer as to those within the time specified. If the demurrer was to every cause of action and the complaint was not amended, you would be required to take action to seek a dismissal. At some point however the court may move to dismiss on its own motion. You certainly do not want to answer causes of action that you successfully demurred to. Good Luck.
If the court sustained a demurrer to the whole complaint, you can ask the court to dismiss the action because the plaintiff has not amended. If the court sustained a demurrer to only part of the complaint, you now must answer the portions to which the court did not sustain the demurrer.