4. "The atomic bombs at our disposal represent only the first step in this direction, and there is almost no limit to the destructive power which will become available in the course of their future development." * O a. Ethos O b. Pathos O c. Logos

Logos

Explanation:

I had to look up the definition of these words to figure it out and logos is the most fitting. Ethos is just saying you're qualified basically, Pathos is attempting to persuade your audience with emotion, Logos is the logical portion of your argument.

greet them:

buenas noches.

that is considered night time which is when "good night" is used.