A class was written to represent regular items and sale items.

At line 03, the developer assigns:

Item.prototype.description = function() { return ' This is a ' + this.name; }

This affects all objects whose prototype chain includes Item.prototype .

regItem inherits from Item → gets this method.

saleItem, as an instance of SaleItem, also inherits Item.prototype (since SaleItem uses prototype inheritance from Item), so it also has this method at this moment.

Outputs at lines 04 and 05:

regItem.description() → " This is a Scarf "

saleItem.description() → " This is a Shirt "

At line 07, the developer overrides the method on SaleItem.prototype :

SaleItem.prototype.description = function() {

return ' This is a discounted ' + this.name;

}

From this point:

regItem still uses the Item.prototype version

saleItem uses the overridden SaleItem.prototype version

Outputs at lines 08 and 09:

regItem.description() → " This is a Scarf "

saleItem.description() → " This is a discounted Shirt "

Combining all results:

This is a Scarf

This is a Shirt

This is a Scarf

This is a discounted Shirt

This matches option B .

JavaScript Knowledge References (text-only)

Objects created from constructor functions use prototype chaining.

Overriding a subclass prototype method does not affect the parent class prototype.

Instances inherit the most specific version of the method on their prototype chain.

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