C and D are correct, but I believe the answer that its looking for is D.
please mark as brainliest?
Answer:
Alarmed over rapid developments in military technology by his Communist rivals in the USSR, President Dwight D. ... High-altitude U-2 spy planes began making reconnaissance flights over the USSR in 1956, giving the U.S. its first detailed look at Soviet military facilitie
Because they were fighting on their own territory and defending their home, the vietcong had greater determination than the US who were not really sure what they were there for.
Answer:
Increased trade for silver from South America contributed to inflation and unrest.
AND
Hardy New World vegetables were grown in previously barren land.
Explanation:
The answer is A. precedent
