A My friend's confidence and eventual profit are sufficient to establish that entrepreneurship benefits society, even without comparing less visible unsuccessful ventures.
B My friend's success shows that calculated risk can create opportunity, but it says little about the probability of success unless the essay also considers comparable ventures that failed or never became profitable.
C Because some new businesses fail, my friend's success cannot illustrate any real opportunity created by entrepreneurship and should be removed from the essay.
D The successful business proves that people who leave stable jobs and accept enough risk are generally rewarded, making failure mainly a sign of insufficient commitment. That phrasing would remain the response’s controlling formulation.
