Can a defendant in a civil action be found to have breached section 425.16, subdivision (e) of the California Civil Code of Civil Procedure Act?

A defendant can meet his or her burden of making a threshold showing that a cause of action is one arising from protected activity by demonstrating the acts underlying the plaintiff's cause of action fall within one of the categories of section 425.16, subdivision (e). (City of Cotati v. Cashman (2002) 29 Cal.4th 69, 78.) Section 425.16, subdivision (e) provides in relevant part: "As used in this section, 'act in furtherance of a person's right of petition or free speech under the United States or California Constitution in connection with a public issue' includes: (1) any written or oral statement or writing made before a legislative, executive, or judicial proceeding, or any other official proceeding authorized by law."