Netscape, which once controlled more than $80$ percent of the market share in Web browsers, lost its dominant position when customers migrated to Internet Explorer, Microsoft's Web browser. Internet Explorer was easy to install and had no significant differences in terms of usability. This example serves to illustrate that:

a$.$ firms with low switching costs can sometimes be rapidly overtaken by strong rivals with additional competitive advantages.

b$.$ firms need to employ increasingly stringent intellectual property norms to guard against infringements from cmaller