Marcie's School Has Adopted the Common Core State Standards for Literacy

Marcie's school has adopted the Common Core State Standards for literacy and mathematics. Why did her school most likely do this?

A) Standards like the Common Core help schools stay accountable for the development and education of children.
B) The Every Student Succeeds Act requires that schools adopt the Common Core State Standards.
C) The Common Core State Standards provide teachers with a specific curriculum that is easy to implement.
D) If a school is to demonstrate accountability, it must adopt the Common Core State Standards.