With no explanation, chose the best option from "A", "B", "C" or "D". was safe to operate, afforded discretion to the FAA to “make its own findings” whether the submitted documentation satisfied that requirement. Id. Likewise, as the district court noted, 49 C.F.R. § 385.17(f) is not a “check list.” J.A. at 105. It leaves it to the FMCSA to determine whether a carrier’s submission provides evidence that corrective action has been taken, and whether the agency has the resources to reach a final decision within 45 days. Such decisions, which relate to a regulatory agency’s “implementation of a mechanism for compliance review” and necessarily require “balancing the objectives sought to be obtained against such practical considerations as staffing and funding,” constitute discretionary functions themselves. Varig Airlines, 467 U.S. at 819-20, 104 S.Ct. 2755 (<HOLDING>). Discretion thus suffuses 49 C.F.R. §

A: holding that the faas application of a spotcheck system to a particular aircraft was a discretionary function
B: recognizing a discretionary function exception to that waiver
C: holding that actions against the faa for its alleged negligence in certificating aircraft for use in commercial aviation are barred by the discretionary function exception of the federal tort claims act id at 821 104 sct 2755 because the faas decisions as to the manner of enforcing regulations is plainly a discretionary activity id at 819 21 104 sct 2755
D: holding that the faas alleged negligence in failing to check certain specific items in the course of certificating a specific aircraft as part of a spotcheck program involved calculated risks but fell squarely within the discretionary function exception
A.