With no explanation, chose the best option from "A", "B", "C" or "D". to believe that he would be prohibited from taking the weapon on board the aircraft. Wallace’s assertion that he sought to introduce this evidence is contradicted by his statement that the parties stipulated to the existence of all elements necessary for a conviction under 49 U.S.C. § 1472(f), with the one exception concerning the question of whether a stun gun is a dangerous weapon within the meaning of the statute. Brief for Appellant at 7. Accordingly, the Government opposes Wallace’s attempt to raise the question of his intent to conceal the weapon on appeal because the record does not show any effort to introduce evidence on non-concealment at trial. See United States v. Whitten, 706 F.2d 1000, 1012 (9th Cir.1983), cert. denied, 465 U.S. 1100, 104 S.Ct. 1593, 80 L.Ed.2d 125 (1984) (<HOLDING>). Assuming, however, that this issue is

A: holding that an argument not raised before the bankruptcy court will not be considered for the first time on appeal
B: holding that issues not raised before the trial court cannot be raised on appeal
C: holding that an issue not presented to the trial court will not be considered on appeal
D: holding that errors not raised before the trial court will not generally be considered on appeal
D.