What does the underlined word "case" in Paragraph 3 refer to?

• A、Container

• B、Evidence

• C、Problem

• D、Product

According to Bryk and Schneider, what was most important for successful school improvemt?

• A、New standards and tests in schools.

• B、Positive social relationships.

• C、Strict teacher and student evaluations.

• D、Assistance of the government

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