Young Abraham Lincoln lives on a farm. He knows learning is important. He works hard to learn reading and math. He has to teach himself. It is difficult to get books and paper. He practices math problems on a board. He cleans the board with a knife. Then he uses it again. He practices reading with the Bible. He copies sentences from it. Sometimes he walks for many miles to borrow a book. What is the main idea of the story?

A.
People who live on farms don't go to school. Abraham Lincoln has to teach himself.
B.
Abraham Lincoln thinks learning is very important and works hard to teach himself.
C.
Abraham doesn't like to practice math problems on paper. He uses a board. He cleans the board with a knife.