This fact pattern will be used repeatedly on this quiz.

April 1, 2020 - Employer in e-mail: "Will pay you $100,000 for 18 months of employment to begin in three months."

April 2, 2020 - Employee response by telephone: "...I will accept if the company pays for a year of my MBA from the W. P. Carey School of Business..."

April 3, 2020 - Employer response by e-mail: "If you want us to pay for a year of your MBA, then we will pay you $90,000."

April 4, 2020 - Employee response by e-mail, "OK. $90,000 and a year of my MBA."

Now assume that in the April 2, 2020 telephone conversation, the employer & employee agreed that the employer will provide 100 stock options to the employee at the end of the term. What should the employee do before signing the final version of the employment contract to prevent the parol evidence rule from excluding this provision about stock options?