Alexander has been working at the same job without a promotion or salary increase for 3 years. He currently makes $44,000 per year, but he thinks that someone with his experience should make $49,000. During his annual performance review, he approaches the topic with the HR supervisor. Alexander asks for a $10,000 a year raise. The supervisor says that the current budget cannot support such an increase. Alexander then asks for a $5,000 a year raise. The HR supervisor agrees. Which technique did Alexander use to attain compliance with his request