<span>Assuming that this is referring to the same list of options that was posted before with this question, <span>the correct response would be the one having to do with the fact that the white southerners were afraid the newly freed blacks would reduce the economic opportunities for whites. </span></span>
Answer:
The development of space travel, and Nuclear warfare.
Explanation:
Development of rockets wasn't the only thing that helped further thinking of the major superpowers. It also further develop Nuclear Warheads, which resulted in the Cuban incident.