Question

In the U.S. in the 1830s, ________ miles of track had been laid. By the 1860s, ___________ miles of track had been laid.

a.
40,000 and 30
b.
30,000 and 30
c.
40 and 30,000
d.
400 and 40,000

Answer 1

C. 40 and 30,000

Answer 2

C is the answer Explanation: i got the question wrong and just looked at the actual answer