What is the burden on a plaintiff to prove that a Defendant has made a reasonable and reasonable offer under section 998 of the California Civil Code?

burden is therefore properly on plaintiff, as offeree, to prove otherwise.'" (Santantonio v. Westinghouse Broadcasting Co. (1994) 25 Cal.App.4th 102, 116-117.) As in Santantonio, defendants in this case obtained a judgment more favorable than their section 998 offers. The burden is therefore on plaintiffs to prove that the offers were unreasonable. Finally, "'whether a section 998 offer was reasonable and made in good faith is a matter left to the sound discretion of the trial court.' [Citation.]" (Santantonio v. Westinghouse Broadcasting Co., supra, at p. 117.)