Alfred Brendel has performed all of Beethoven's piano sonatas to acclaim. Therefore, Alfred Brendel must be a good interpreter of Beethoven's piano works." What is the central assumption in this argument? (Note: Assumptions are unstated reasons.)

a. Those who have performed all of Beethoven's piano sonatas to acclaim must be good interpreters of Beethoven's piano works.

b. Those who have performed Beethoven's works to acclaim must be good interpreters of Beethoven's piano sonatas.

c. Those who have performed Beethoven's piano works to acclaim must be good interpreters of Beethoven's piano sonatas.

d. Alfred Brendel has performed all of Beethoven's piano sonatas to acclaim Alfred Brendel must be a good interpreter of Beethoven's piano works