Answer:a small wealthy class, a growing middle class, and a large class of working poor
Explanation:
A bond rating is a grade given to bonds that indicates their credit quality. Independent rating services such as Standard & Poor's and Moody's provide these evaluations of a bond issuer's financial strength, or its ability to pay a bond's principal and interest in a timely fashion.
The group included 120 wagons, about 1,000 people and thousands of livestock. Their trek began on May 22 and lasted five months. It effectively opened the floodgates of pioneer migration along the Oregon Trail and became known as the "Great Migration" of 1843.
