What is this passage mostly about?
From the story Wesley Harris : An account of escaping slavery

The difference between the lower class limits of adjacent classes provides the

Which of the following statements most accurately describes the requirement for the documentation of minors’ assent to participate in research? parents must approve written documentation.documentation is required unless waived by an irb.to protect minors documentation is always required.federal regulations do not require the documentation of minors’ assent.

The biggest component / ingredient of summer time smog is