單項選擇題

You design a Business Intelligence （BI） solution by using SQL Server 2008.
The solution includes a SQL Server 2008 Analysis Services （SSAS） database. The database contains a cube named Financials. The cube contains objects as shown in the exhibit. （Click the Exhibit button.）
A calculated member named Gross Margin references both Sales Details and Product Costs. You need to ensure that the solution meets the following requirements：
Managers must be able to view only their cost centers percentage of the companys gross margin. The impact on query performance is minimal. What should you do？（）

A. Add dimension-level security and enable the Visual Totals option.
B. Add cell-level security that has read permissions on the Gross Margin measure.
C. Add cell-level security that has read contingent permissions on the Gross Margin measure.
D. Change the permissions on the Managers dimension level from Read to Read/Write.

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You design a Business Intelligence （BI） solution by using SQL Server 2008. The solution includes a SQL Server 2008 Analysis Services （SSAS） database. A cube in the database contains a large dimension named Customers. The database uses a data source that is located on a remote server. Each day， an application adds millions of fact rows and thousands of new customers. Currently， a full process of the cube takes several hours. You need to ensure that queries return the most recent customer data with the minimum amount of latency. Which cube storage model should you use？（）

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You design a Business Intelligence （BI） solution by using SQL Server 2008. The solution contains a SQL Server 2008 Analysis Services （SSAS） database. A measure group in the database contains log entries of manufacturing events. These events include accidents， machine failures， production capacity metrics， and other activities. You need to implement a data mining model that meets the following requirements： Predict the frequency of different event types. Identify short-term and long-term patterns. Which algorithm should the data mining model use？（）

A. the Microsoft Time Series algorithm
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