商业银行开展个人理财业务，应与客户签订合同，明确双方的（），并根据业务需要签署必要的客户委托授权书和其他代理客户投资所必须的法律文件。

A、权利

B、责任

C、义务

One of the chief concerns of wildlife management is the protection and improvement of the natural habitat so that animals have enough food and water to survive. Wildlife management involves care of the soil to produce good vegetation, it also involves care of plants, not only as a source of food, but also as protection. Animals need cover to hide from their natural enemies and to raise their young safely.
Just as crops are harvested, wildlife too must sometimes be "harvested" . By allowing limited hunting, good management can control certain species that threaten to overpopulate their habitat.