Quarry Equipment Corporation and Rock & Gravel Inc

Quarry Equipment Corporation and Rock & Gravel Inc. enter into a lease of three bulldozers. Under the perfect tender rule, Quarry must ship or tender bulldozers to Rock & Gravel that, with respect to the contract description, conform

A) to the best of Quarry's ability under the circumstances.
B) to a reasonable extent.
C) in every way.
D) to a substantial degree.