The Chinese kept silk production a secret because it was very important to their culture and economy for thousands of years.
The correct answer is the <span>Continental Congress because it fits the description that you provided. It didn't have to work in secrecy once the independence was proclaimed and the war began.</span>
D. Pullman car was a train car. Standard time was used by railroads so trains would not crash into each other. Standard gauge was the size of
Tracks so any railroad could use it.
