A Plumbing Supply Firm Can Win a Contract with a Home-Building

A plumbing supply firm can win a contract with a home-building business by promising to get 500 faucet assemblies of a certain make by Tuesday morning. Actually, the customer representative finalizing the deal knows that their supplier normally takes an extra day to get them to the firm. But lately, due to the housing slowdown, shipments have been arriving a day earlier.
The customer representative therefore promises Tuesday delivery to the home-building business, reasoning that if the faucets do come a day later, as they often do, he can come up with a plausible excuse.
Which of the following, if true, undermines the customer representative's ethical position?
The representative knows that a snowstorm has disrupted travel at the hub through which the faucets will be shipped, so there is no way they will arrive by Tuesday.
The contract with the home-building company is important to win, as the plumbing supply firm is short on cash and needs the proceeds of the deal to pay off some pressing debts.
The home-building firm is notorious for finishing its units well after the scheduled date, so a delay in the faucets will not make that much difference.
The housing slowdown seems likely to go on in the firm's area, so it's probable that shipments will continue to come in a day early.
The customer representative and the head engineer for the home-building business play golf together regularly.