Critical Reasoning

Bands that are signed to recording contracts with major record
labels generate higher average record sales than do bands who
sign contracts with independent labels. The characteristics of
the record label, such as marketing expertise and promotional
budgets, must be a more important causative factor in record
sales than are characteristics of the band, such as musical
talent and ambition.
Which of the following, if true, most seriously weakens the
argument above?

a A band's musical talent is a more important factor in
selling records than its ambition.
b Some independent record labels have as much marketing
expertise as do major labels.
c Consumers state that musical talent is their top criterion in
determining which records to buy.
d Some bands signed to contracts with independent labels
produce top-selling records.
e Major record labels base their decisions to sign bands on
characteristics of the band, including musical talent and
ambition.

ps:answer unknown