With no explanation, chose the best option from "A", "B", "C" or "D". 56(c)(1); Beard v. Whitley Cnty. REMC, 840 F.2d 405, 410 (7th Cir.1988). To establish a genuine issue of fact, the nonmoving party must come forward with specific facts showing that there is a genuine issue necessitating trial, not “simply show that there is some metaphysical doubt as to the material facts.” Matsushita Elec. Indus. Co., Ltd. v. Zenith Radio Corp., 475 U.S. 574, 586, 106 S.Ct. 1348, 89 L.Ed.2d 538 (1986); First Nat’l Bank of Cicero v. Lewco Secs. Corp., 860 F.2d 1407, 1411 (7th Cir.1988). If the nonmoving party fails to establish the existence of an essential element on which it bears the burden of proof at trial, summary judgment is proper — even mandated. Massey v. Johnson, 457 F.3d 711, 716 (7th Cir.2006) (citing Celotex, 477 U.S. at 322-23, 106 S.Ct. 2548) (<HOLDING>). In ruling on a motion for summary judgment, a

A: holding that a failure to prove one essential element necessarily renders all other facts immaterial
B: holding that failure to prove an essential element of an offense does not constitute fundamental error which may be raised for the first time on appeal
C: holding that causation is an essential element in failure to warn claim
D: holding that failure to instruct on an essential element was harmless error because the element was so clearly established
A.