(A) ** True
(B) False
EXPLANATIONS BELOW
Concept note-1: -By 1860, 30, 000 miles (49, 000 km) of railroad tracks had been laid, with 21, 300 miles (34, 000 km) concentrated in the northeast.
Concept note-2: -By 1860 there were roughly 31, 000 miles of track in the country, concentrated in the Northeast but also in the South and Midwest.
Concept note-3: -Trackage increased from 35, 000 miles in 1865 to 254, 000 miles in 1916, the eve of America’s entry into World War I.