Sentence Correction

[BTGmoderatorRO]

Like Mozart's first concerts, Frederic Chopin began performing at age six, both for private parties and public charity events.

(A) Like Mozart's first concerts, Frederic Chopin began performing at age six
(B) Like Mozart's young age, Frederic Chopin began performing at age six
(C) Like Mozart and his first concerts, Frederic Chopin began performing at age six
(D) Like Mozart, Frederic Chopin began performing at age six
(E) Like Mozart's first concerts, Frederic Chopin began performing at age six

OA is D

which is the question talking about? The age or the performing time?
I would an expert approach on this.