C Makes a Large Contract with E to Supply Food

C makes a large contract with E to supply food and beverages for E's huge Christmas party. C then enters into a contract with D, under which D will supply 10,000 mince pies to C on 24 December for £5000. In which scenario is duress least likely to be established?

A) D calls on 1 May and threatens not to supply any mince pies if C does not pay an extra £10,000.
B) 5 days before the delivery date, after making 1,000 mince pies, D realises that she had underestimated the costs of ingredients. D tells C that she will stop making the mince pies if C does not pay another £2000.
C) D calls in on 23 December and threatens not to supply the mince pies unless C pays another £5000.
D) 1 week before the delivery date, D calls C and threatens not to supply the mince pies unless C pays another £5000. E had asked for customised mince pies, and D is aware of the fact no other bakery will be able to meet those demands with such short notice.