(a) That's wrong. 

You were asked to select the case that provides authority for the rule that advertising or displaying goods for sale normally amounts to an ‘invitation to treat’ rather than a legal ‘offer’ capable of ‘acceptance’.

Partridge v Crittenden [1968] 2 All ER 421 is the relevant case.  The other listed cases do not provide such authority.

Give yourself no marks for this answer.

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