A.
The property disagreements between the Zhang brothers were strenuously mediated by friends and relatives, and now the two have agreed and made up.
B.
Friends and relatives have strenuously mediated the property disputes between the Zhang brothers, and now the two have agreed to make up.
C.
With strenuous mediation by friends and relatives, the Zhang brothers have reached an agreement .
D.
TheZhang brothers’ disputes have been well coordinated by their relatives and friends.