Which of the options correctly combines the following two given sentences without changing the meaning? She was asleep. Thieves broke in and stole her handbag.

• A.  If she was asleep, thieves broke in and stole      her handbag.
• B.  While she was asleep, thieves broke in and stole her handbag.  
• C.  Although she was asleep, thieves broke in and stole her handbag.
• D.  Whenever she was asleep, thieves broke in and stole her handbag.