Question:You need to return the contents of an isolated storage file as a string. The file is machine-scoped and is named Settings.dat. Which code segment should you use? 

A IsolatedStorageFile= isoFile; 
 isoFile = IsolatedStorageFile::GetMachineStoreForAssembly(); IsolatedStorageFileStream= isoStream; 
isoStream = gcnew IsolatedStorageFileStream( 
 "Settings.dat", FileMode::Open, isoFile); 
 String= result = (gcnew StreamReader(isoStream))->ReadToEnd(); 
B IsolatedStorageFileStream= isoStream;
 isoStream = gcnew IsolatedStorageFileStream( 
 "Settings.dat", FileMode::Open); 
 String= result = isoStream->ToString(); 
C IsolatedStorageFile= isoFile; 
 isoFile = IsolatedStorageFile::GetMachineStoreForAssembly(); IsolatedStorageFileStream= isoStream; isoStream = gcnew IsolatedStorageFileStream(
 "Settings.dat", FileMode::Open, isoFile); 
 String= result = isoStream->ToString(); 
D IsolatedStorageFileStream= isoStream; 
 isoStream = gcnew IsolatedStorageFileStream(
 "Settings.dat", FileMode::Open); 
 String= result = (gcnew StreamReader(isoStream))->ReadToEnd(); 

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