The correct option is "Few barriers to market entry exist. "
Monopolistic competition or competition between monopolies is a type of competition in which there is a significant number of producers acting in the market without there being a dominant control by any of these in particular. This is very common within the markets of products normally found in supermarkets, where there are products of different brands, but with particular characteristics and within each product group, the characteristics make them different from each other, but sufficiently similar to compete with other producers and each other.