Answer:
a. competitor
Step-by-step explanation:
Where a new firms decide to supply or produce goods or services that are of close substitute to the ones produced by a firm, such new firms are termed competitors to the old ones. This is because the two firms both new and old will be competing for the scarce resources of the consumer and the market share. Here Panera Bread will be offering goods of close substitute to Rosemarie and Dominique products