[单选]
You have an enterprise subordinate certification authority （CA） configured for key archival. Three key recovery agent certificates are issued.
The CA is configured to use two recovery agents.
You need to ensure that all of the recovery agent certificates can be used to recover all new private keys.
What should you do（）

A . Add a data recovery agent to the Default Domain Policy.
B . Modify the value in the Number of recovery agents to use box.
C . Revoke the current key recovery agent certificates and issue three new key recovery agent certificates.
D . Assign the Issue and Manage Certificates permission to users who have the key recovery agent certificates.

You are writing an application that uses SOAP to exchange data with other applications. You use a Department class that inherits from ArrayList to send objects to another application. The Department object is named dept. You need to ensure that the application serializes the Department object for transport by using SOAP. Which code should you use？（） A。 B。 C。 D。下列哪些内容属于安全投资保障的范围？（）安全技术投资。工业卫生投资。辅助设施投资。宣传教育投资。生产装置。天人感应将企业的资产负债表和损益表相联接的财务比率是（）。资产负债率。流动比率。营业收入利润率。总资产周转率。经验类化说强调下列哪种因素在学习迁移中的作用（）心理官能的发展。两种任务的共同要素。概括化的原理。对各要素间关系的理解。

You have an enterprise subordinate certification authority （CA） configured for key archival. Three key recovery agent certificates are issued.
The CA is configured to use two recovery agents.
You need to ensure that all of the recovery agent certificates can be used to recover all new private keys.
What should you do（）

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