With no explanation, chose the best option from "A", "B", "C" or "D". two days before that term expired, and that he therefore satisfied the production and marketing requirements in the lease. The Davises, on the other hand, complain that waiting until nearly the end of a ten-year primary term to market the oil and gas was unreasonable and therefore breached the covenant to market. In Gazin v. Pan American Petroleum Corp., 367 P.2d 1010 (Okla.1961), the Oklahoma Supreme Court held: Where an oil and gas lease does not, in express terms, provide for the marketing of the product of a well drilled on leased land, any cov Ed. 1391 (1936); Brewster v. Lanyon Zinc Co., 140 F. 801 (8th Cir.1905) (lease contained implied covenant to use reasonable diligence to explore for, develop, and produce oil and gas); Molter v. Lewis, 156 Kan. 544, 134 P.2d 404 (1943) (<HOLDING>); Swamp Branch Oil & Gas Co. v. Rice, 253 Ky.

A: recognizing implied duty to produce and market
B: recognizing cause of action for implied covenant of good faith and fair dealing in atwill employment contract
C: recognizing implied covenant to market gas
D: holding language of lease did not indicate implied covenant of continued use
C.