The typical risks of a differentiation strategy do NOT include which of the following?

i$)$ Customers may find the price differential between the low$-$cost product and the differentiated product too large.

ii$)$ Customers' experience with other products may narrow customers' perception of the value of a product's differentiated features.

iii$)$ Counterfeit goods are widely available and acceptable to customers.

iv$)$ Suppliers of raw materials erode the firm's profit margin with price increases.