Read this excerpt from the secondary source “Abraham Lincoln’s Boyhood Home at Knob Creek.”

Lincoln once wrote that while living on Knob Creek he and his sister, Sarah, were sent for short periods to an A, B, C school—the first kept by Zachariah Riney, and the second by Caleb Hazel. These were subscription schools and lasted only a few months. Free schools did not come to Kentucky until the 1830s.

The information in this source gives the reader a better understanding of

why Lincoln lacked a formal education.
what Lincoln’s teachers were like.
why Lincoln’s education was free.
what Lincoln learned in A, B, C schools.