Which of the following is true of the Pan-Canadian Framework on Clean Growth and Climate Change? 1) It specifies a backstop program to price carbon if provinces or territories are unwilling or unable to administrate one. 2) It covers carbon pricing but not measures to adapt to a changing climate. 3) It requires provinces and territories to establish a BC-style tax on carbon emissions. 4) It specifies that all revenues earned from carbon pricing should be rebated back to residents in the same way as the BC carbon tax.