Need answer on this question :Toefl® reading(confused)

[Acc1444]

According to you, what will the answer ???
Correct answer is C. I think C is mentioned in passage where I underlined. If anyone got it, please reply.
By the way, brown page is a cover of book which I am referring.

If you can read, I have also uploaded on this website.

TOEFL listening discussions: A conversation between a research professor and a student

[Beeesneees]

The corrct answer is (C) because this is the untrue answer.

A - the pianoforte is an earlier version of the piano TRUE
B - Both were born in the 18th Century - TRUE
D - Mozart composed when he was young TRUE

C - Only one person listened to Mozart's 1st performance UNTRUE. He performed in public for an audience. An audience is made up of more than one person. The one audience contained lots of people.
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Cheers m' dears!

[Acc1444]

Thnxxx for reply.