With no explanation, chose the best option from "A", "B", "C" or "D". becomes one of degree. And the extent of the burden that will be tolerated will of course depend on the nature of the local interest involved, and on whether it could be promoted as well with a lesser impact on interstate activities.” Id. I first look for a legitimate public purpose that defendants intended to advance by implementing flow control. The Supreme Court has expressly found that waste collection, disposal and management are core traditional functions of local government. United Haulers, 550 U.S. at 344, 127 S.Ct. 1786. Defendants indeed have a legitimate local purpose: to ensure the economic viability of landfills within the District and to protect and safeguard the public health and welfare. See U & I Sanitation v. City of Columbus, 205 F.3d 1063, 1070 (8th Cir.2000) (<HOLDING>). Indeed, the regulations give Broward County a

A: holding that even when there is a legitimate government purpose the discrimination must bear at least some rational relationship to that purpose
B: holding authority to control limits duty to control
C: recognizing economic viability as a legitimate local purpose in the context of a waste flow control ordinance
D: holding that the irs has a law enforcement purpose in the context of a criminal tax investigation
C.