What improvement did americans make on roads in the early 1800s?
a.
narrowing them
c.
setting them on a bed of gravel
b.
coating their surfaces with mud
d.
charging travelers to use them

Which option best completes the diagram? the cold war is the major u. s. foreign policy priority terrorism becomes a major concern of u. s. foreign policy. a. the second iraq war begins. b. the september 11 terrorist attacks occur. c. terrorists attack the 1972 summer olympics. o d. the soviet union collapses.