With no explanation, chose the best option from "A", "B", "C" or "D". the railroad employees’ and community concerns about noise exposure and balanced those concerns with the safety rationale of audible warning devices. Furthermore, like the speed regulations addressed in Easterwood, state statutes which promulgated maximum decibel levels could vary from state to state as could jury verdicts, defining maximum decibel levels. These varying rulings would undercut the Congressional goal of national uniformity. See Thirkill v. J.B. Hunt Transp., Inc., 950 F.Supp. at 1107 (citing 49 U.S.C. § 20106, entitled “National uniformity of regulation” under which Congress promotes a policy of national uniformity of laws, rules, regulations, orders and standards relating to railroad safety); see also Law v. General Motors Corp., 114 F.3d 908, 909-11 (9th Cir.1997) (<HOLDING>). More important, differing regulations or

A: recognizing a selfevaluative privilege to railroad companys investigation of an accident in light of the publics stake in the improvement of railroad safety
B: holding that it has long been settled that congress intended federal law to occupy the field of locomotive equipment and safety particularly as it relates to injuries suffered by railroad workers in the course of their employment and that this broad preemptive sweep is necessary to maintain uniformity of railroad operating standards across state lines
C: holding that where train speed and locomotive design complied with federal regulations railroad employees fela claims were preempted by the frsa since congress has established a policy of national uniformity of laws rules regulations orders and standards
D: holding that federal law establishes the applicable standards of care in the field of aviation safety generally and thus preempts the entire field from state regulation
B.