C. because the printing press had to be used manually so it took a really long time.
This historian would be using the skill of "comparative analysis," since he or she is comparing a wide variety of sources to draw a conclusion between them as a group.
Answer:
The space suit
Though the first man stepped on the moon in 1969, in the 1930s astronomers and physicists were already planning for the voyage to outer space. Emilio Herrera Linares, a Spanish military colonel, is credited with being the first to design a pressurised suit which was used in a high-altitude balloon flight in 1936.
The modern mop
While the mop isn’t the most glamorous of inventions, it certainly is one of the most useful. People had been using rags to wash floors since the 15th century but it was in the 1960s that the engineer Manuel Jalón Corominas had the idea to create a purpose-built mop with a bucket to ring the water out in.
Explanation:
that's just a few ^_^!!!
D <span>the U.S.S.R. was reluctant to grant independence to the Baltic states
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Answer:
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