Two strategic groups become apparent while implementing strategic group mapping for the U$.$S$.$ domestic airline industry: low$-$cost$,$ point$-$to$-$point airlines $($Virgin Atlantic, Alaska Airlines, JetBlue, and Southwest Airlines$)$ versus differentiated airlines using a hub$-$and$-$spoke system $($American$,$ Delta, and United$).$ Which of the following statements is true about these two strategic groups?a$.$American, United, and Delta Airlines will be affected differently by Porter's five competitive forces.b$.$Competitive rivalry between Virgin Atlantic and Delta Airlines is likely to be higher than that between American, Delta, and United.c$.$Competitive rivalry between Virgin Atlantic and JetBlue is likely to be higher than that between American and Southwest Airlines.d$.$Really Alaska