All options/actions available to the player in the mission A Long Way To Fall.
Hint: if Nico shoots Alonso, he will not warn Teddy Benavindez that an unknown person is approaching him; he (Teddy Benavindez), in turn, will not be able to alert his personal security; thus, Benavindez's people will not be ready for Niko's appearance. As a result, further passage of the mission will be a little easier. If Alonso remains alive, then he (Alonso) will warn Teddy Benavindez about Nico. Accordingly, Benavindes' men will be on alert. Thus, completing the mission will become somewhat more difficult.