Which of the following statements are correct?

The classification of the members of a manufacturing supply chain in a hierarchical manner is called tiers.

Tier$-$II suppliers do not have any impact on a firm$$s performance.

Tier$-$III suppliers provide goods to Tier$-$II suppliers.

Tier$-$III suppliers do not have any impact on a firm$$s performance as they are not directly linked to the firm.

A$.$

Only III

B$.$

I and IV

C$.$

II and IV

D$.$

I and III