7. John left his home and walked \( 3 \) blocks to his school, as shown in the accompanying graph. What is one possible interpretation of the section of the graph from point B to point \( C \) ? \( *\)
1) John arrived at school and stayed throughout the day, 2) John waited before crossing a busy street. 3) John returned home to get his mathematios homework. 4) John reached the top of a hill and began walking on level ground.