Can we draw the following hypothesis from the context (see options)? 

Context:

Valentino D. B. Mazzia (February 17, 1922 – March 10, 1999) was an American physician who served as chairman of the department of anesthesiology at the New York University School of Medicine and was a pioneer in the forensic analysis of deaths occurring during surgical procedures. He testified in many criminal cases about the use and presence of anesthesia products in cases of death.

Hypothesis: Valentino D.B. Mazzia testified that anesthesia products are present in many death cases.
Pick your answer from: A). Yes. B). It's impossible to say. C). No.
A).