African slavery in America was based on raising cash crops for export. Several crops were raised by slave labor but the outstanding crop was:
A) Tobacco
B) Rice
C) Cotton
D) Sugar

Option: D. Sugar

Explanation:

African slaves brought in America after the introduction of the triangular trade. Slaves sent in America and in Caribbean Island to work in plantations. Several crops raised but the prominent harvest turns out to be sugar. Sugar plantation began during the 17th century after sugarcane brought from West Indies. The industry grew rapidly in some southern parts of America, and by 1830 New Orleans had the largest sugar refinery                                                                                                              

The answer is Rice

Explanation:

Rice was the main crops that were planted.

some american cities felt workers were being oppressed by business monopolies