Which of the following options suitably represents the required code?

You are employed as an application developer at ABC.com. You make use of Microsoft .NET
Framework 4 to develop Windows Forms applications.
You have been instructed to create a new application. The application must present a text
message requesting users to update their settings. This should occur whenever a user starts the
application.
Which of the following options suitably represents the required code?

A.
sealed class FormSettings : ApplicationSettingsBase
{
[UserScopedSetting()] [DefaultSettingValue(“Please update your settings.”)]
public String Description
{
get { return (String)this[“Description”]; }
set { this[“Description”] = value;}
}
}

B.
sealed class FormSettings : ApplicationSettingsBase
{
ApplicationScopedSetting()] [DefaultSettingValue(“Please update your settings.”)]
public String Description
{
get { return (String)this[“Description”]; }
set { this[“Description”] = value;}
}
}

C.
sealed class FormSettings : ApplicationSettingsBase
{
[MachineSetting()] [SettingsDescription(“Please update your settings.”)]
public String Description
{
get { return (String)this[“Description”]; }
set { this[“Description”] = value;}
}
}

D.
sealed class FormSettings : ApplicationSettingsBase
{
[UserScopedSetting()] [SettingsDescription(“Description: Please update your settings.”)]
public String Description
{
get { return (String)this[“Description”]; }
set { this[“Description”] = value;}
}
}

E.
sealed class FormSettings : ApplicationSettingsBase
{
[ApplicationScopedSetting()] [SettingsDescription(“Description: Please update your settings.”)]
public String Description
{
get { return (String)this[“Description”]; }
set { this[“Description”] = value;}
}
}

F.
sealed class FormSettings : ApplicationSettingsBase
{
[MachineSetting()] [SettingsDescription(“Description: Please update your settings.”)]
public String Description
{
get { return (String)this[“Description”]; }
set { this[“Description”] = value;}
}
}

Explanation: