Suppose Another Firm Found a Way to Offer IKEA's Customers

Suppose another firm found a way to offer IKEA's customers (young buyers interested in stylish furniture at low cost) additional sources of differentiation while charging the same price or to provide the same service with the same sources of differentiation at a lower price.Which of the following categories of competitive risk to a focus strategy would this be?

A) An industry-wide competitor decides that the market segment served by IKEA is worth entering.
B) A competitor may focus on a more narrowly defined segment and thereby "out-focus" the focuser.
C) The needs of the customers in this narrow segment have become more similar to those of industry-wide competitors.
D) Experience can narrow customer's perceptions of value of the firm's differentiated features.