The answer is C I just took the test so.
It's B so they can reduce the risk of war by maintaining a strong deterrent and by seeking genuine arms control.
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.
Based upon the given choices, the two that BEST answer and fit the question are;
3: Stopped Exports
4: Raised Tariffs
I hope this is sufficient and has aided you.
Cheers.
