The improvements to commercial shipping through the first three decade

The improvements to commercial shipping through the first three decades of the 1800s through business and technological innovations

A) had little effect in making the trans-Atlantic commercial shipping more efficient because commercial vessels still had to wait until their holds were filled before sailing.
B) came about mostly because of the monopoly in trans-Atlantic commercial shipping enjoyed by Jeremiah Thompson and his Black Ball Line.
C) ensured a steady stream of cotton for English mills and steady profits for U.S. cotton growers in the 1820s and 1830s.
D) did not improve the efficiency or speed of delivering the U.S. mail across the Atlantic or to port cities in America.

ANSWER
Answer: C