Read this excerpt from wheels of change by sue macy.

it is a challenge for many african girl students to remain in school. a myriad of obstacles often stand in their way. they have so many chores to do in the morning they often cannot get to school or start their lessons on time. or, their parents need them to take care of younger siblings while they go work in the fields—a job they would never bestow on their boy children. it used to take lewanika an hour to walk to and from school. now her biking commute is 20 minutes. lewanika is able to get her chores done, make it to school on time, and feel refreshed enough to pay attention in class.

what problem is described in the excerpt?

the difficulty level of the chores assigned to african girls
the time limitations preventing african girls from attending school
the expenses associated with purchasing bicycles for african girls
the academic competition african girls face in the public schools