Answer:
b. the implied warranty of merchantability
Explanation:
Implied warranty of merchantability refers to an implied assurance, in every sales transaction that the seller's goods are safe and fit for intended purpose of usage.
It represents an unspoken guarantee on the part of the seller that his goods conform to the acceptable standards and properly packaged and labeled and abide by the promises conveyed on their label.
The motive behind such a warranty being, the seller must properly inspect and test the quality of his goods before releasing them or making them available for sale in the market.
In the given case, the seller sold skis to the customer which cracked into two upon usage. The seller isn't aware of the cause of the consequence. Thus, the seller breached the principle of implied warranty of merchantabilty as per which, it should've first checked and inspected the skis before making them available for sale.