Read the text and determine if the sentence is true (see options at the end):

WannaCry attack is good business for cyber security firms SAN FRANCISCO For Kris Hagerman, chief executive of UK-based cyber security firm Sophos Group Plc , the past week could have been bad. The WannaCry "ransomware" attack hobbled some of its hospital customers in Britain's National Health Service, forcing them to turn away ambulances and cancel surgeries.

Sentence: Hospital patrons knew about the "ransomware" attack.
Available choices:
A). Yes.
B). It's impossible to say.
C). No.
B).