In total， 30 rats （） into three groups （ECM/control， ECM/bFGF， and ECM/Re） were used in the study.

In total， 30 rats （） into three groups （ECM/control， ECM/bFGF， and ECM/Re） were used in the study.
A.conducted
B.divided
C.examined
D.measured
正确答案：divided