#2- Trade emerged as a main source of income.
Answer:
I think it's A but I don't know, sorry if I'm wrong
Answer:Because that's when great tasks were accomplished.
Explanation:
For me, both B and D make sense. Do you have any text I can read?
Answer:
The first test in that series, the Bravo test, took place on March 1, 1954. Bravo was a device using Lithium Deuteride as its fuel and the explosion yielded 15 megatons, the largest bomb ever exploded by the United States. The bomb was in a form readily adaptable for delivery by an aircraft and was thus America's first weaponized hydrogen bomb.
Explanation: