President Obama's Education Secretary Suggested What to Address the Problem

President Obama's education secretary suggested what to address the problem of the state-dependent standards in the No Child Left Behind act?

A) the need to have higher standards for higher-achieving students
B) the need to have a set of common standards across all 50 states
C) the need for some students to be granted extended periods of time to complete standardized assessments
D) the need for two sets of standards for each state (one for higher achievers and one for lower achievers)