<span>
Acids and bases where traditional considered as substances that when
dissolved in water increase the concentration of H+ and OH- ions
respectively. This is the so called "Arrhenius" definition. </span>
Surveyor 1 was the first American spacecraft to land on the moon.
It was "John Jay" who negotiated a trade treaty between the United States and Great Britain in 1794, since it was clear that it would be mutually beneficial for these nations to continue trading with one another.
D: Candidates need to pay attention to how their personal appearance might affect public appearance.
Despite the other options being other relevant factors in a presidential campaigns, the D statement is the one that relates best to the facts told in the excerpt. As it describes how their appearance influenced public opinion, and considering how television (and now internet) gained relevance over radio on the following decades after 1960.