Why were commuter rail lines that were powered by electricity an improvement over earlier forms of cummuter rail lines?

Which is likely the most serious problem associated with an epidemic? 1. there are sometimes no cures to the diseases that spread. 2. people often die from the diseases that spread. 3. there are usually no ways to prevent people from getting ill. 4. people often don’t know they have a disease.

What was the purpose of the u.s navy's convoy system

Which of the following people did not run for president in 1848. a. lewis cass. b. zachary taylor. c. martin van buren. d. millard fillmore.