With no explanation, chose the best option from "A", "B", "C" or "D". to whether there was substantial evidence in the record to support such a finding. 29 U.S.C. § 160(e); see Universal Camera Corp., 340 U.S. at 488, 71 S.Ct. 456; Beverly Farm Found., 144 F.3d at 1051. In this case, Jet Star claims that it discharged Krueger because he was abusing the equipment by starting trucks in too high a gear. Yet when Smith and Mulligan allegedly saw Krueger exit the parking lot in fourth or fifth gear on March 10, 1997, Krueger was not called back to work nor was he prevented from making a second delivery that day. Moreover, Krueger was never formally warned about the potential consequences of abusing the trucks, and was discharged without even a cursory investigation into the reported misconduct. See NLRB v. Advance Transp. Co., 979 F.2d 569, 574 (7th Cir.1992) (<HOLDING>). While this evidence is not conclusive as to

A: holding employer statements of policy can give rise to contractual rights without evidence of mutual agreement
B: holding that failure to record an assignment does not give rise to a cause of action
C: holding that evidence of a cursory investigation can give rise to an inference of an unlawful motive
D: holding that the timing of a discharge may indicate the existence of an unlawful motive
C.