Answer:
a. The supplier has more bargaining power than the firm.
Step-by-step explanation:
This is an example of one of Porters' five forces. The supplier has a monopoly and thus entertains a high market share. This means that the supplier has more bargaining power than the firm as if the firm wants the ceramic there are no alternative options available for the firm; however, if the firm does not want supplies, the supplier can find plenty of firms that may need the ceramic thus making supplier more powerful than the firm.
Hope that helps.