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

Context:

Def Leppard are an English rock band formed in 1977 in Sheffield as part of the new wave of British heavy metal movement. The following is a complete list of all official members, session musicians, featured artists, touring musicians, and live guests of Def Leppard's career

Hypothesis: The list contains different facts about Def Leppard's musical history.
Select from the following.
a). Yes
b). It's impossible to say
c). No
a).