Social Studies check my answers please
posted by Sarah W.
1. Who invented the sewing machine?
2. By 1860 the Midwest and the east were united by a network of_____?
B. Railroad tracks****
D. Steam-powered ships
3. Which invention filled the need for a method of communication that kept up with the industrial growth and fast-paced travel?
A. Cotton grin
C. Steam engine
4. By 1860 the United States had almost 31,000 ______?
A. Clipper ships
B. Miles of Telegraph lines
D. Miles of rail road tracks*****
Please just check my work and if you see something wrong don't just say wrong please tell me which one. I think they are all right.