Select the option that best explains the information conveyed in the sentence.

My son, who is in the U.S.A. is studying Engineering?

• A my only son in the U.S.A studying Engineering
• B one of my sons is in the U.S.A studying Engineering
• C my sons are in the U.S.A but only one is studying Engineerin
• D only son in in U.S.A studying Engineerin