Which code segment should you use?

You are developing a library management application that uses the ADO.NET Entity
Framework against a SQL Server database. The application has a method that returns
check outs filtered by date.
The Book class is shown below.

You must filter the data on the SQL server before it is returned to the application server. You
need to return books checked out more recently than the entered date. Which code segment
should you use?

A.
Option A

B.
Option B

C.
Option C

D.
Option D

Explanation:
Case Study: 1
Scenario 1
Background
You are developing a flight information consolidation service. The service retrieves flight
information from a number of sources and combines them into a single data set. The
consolidated flight information is stored in a SQL Server database. Customers can query
and retrieve the data by using a REST API provided by the service.
The service also offers access to historical flight information. The historical flight
information can be filtered and queried in an ad hoc manner.
The service runs on a Windows Azure Web Role. SSL is not used.
Business Requirements
A new data source for historical flight information is being developed by a contractor
located on another continent.
If a time zone is not specified, then it should be interpreted as Coordinated Universal
Time (UTC).
When you upgrade a service from a staging deployment to a production deployment, the
time that the service is unavailable must be minimized.

The default port must be used for HTTP.
Technical Requirements
The existing sources of flight information and the mechanism of exchange are listed
below.
Blue Yonder Airlines provides flight information in an XML file.
Consolidated Messenger provides flight information in a Microsoft Access database that
is uploaded every 12 hours to the service using SFTP. The company uses port 22 for
SFTP.
Margie’s Travel provides and consumes flight information using serialized ADO.NET
DataSets. Data is periodically synced between the service and Margie’s Travel.
Trey Research provides data from multiple sources serialized in proprietary binary
formats. The data must be read by using .NET assemblies provided by Trey Research.
The assemblies use a common set of dependencies. The current version of the Trey
Research assemblies is 1.2.0.0. All assemblies provided by Trey Research are signed
with a key pair contained in a file named Trey.snk, which Trey Research also supplies.
The application specification requires that any third-party assemblies must have strong
names.
Application Structure