Carl Smith collided with a concrete lamp-post while skating and suffered a skull fracture that caused a coma. When he failed to regain consciousness, his parents on August 8 consented to his life support machine being turned off.

Based on that paragraph can we conclude that this sentence is true?
Carl Smith collided with a concrete lamp-post while surfing

Select from:
 a). Yes.
 b). It's impossible to say.
 c). No.