how did Mexico react to John Slidell's offer to buy California and resolve the border dispute?

Mexico wanted further negotiations?
Mexico happily agreed to the offer?
Mexico declared war?
Mexico felt insulted and rejected the offer?

Mexico felt insulted and rejected the offer. When John Slidell made the offer to buy California and resolve the border dispute with Mexico in 1845, the Mexican government strongly rejected it. They viewed the offer as disrespectful and perceived it as an infringement on their sovereignty. This rejection eventually led to increased tensions between the United States and Mexico, ultimately resulting in the Mexican-American War, which began in 1846.