Riddle

It stands upright and can be quite grand. Its secret is not hidden but right at hand. What is it?

Choose an answer

A.An organ
B.A harpsichord
C.A keyboard
D.A piano
Hint: It's a 2-word phrase with 6 letters, starting with "A".

Answer

A piano

Why this is the answer

An upright piano stands tall, a grand piano is the largest and most impressive kind, and its "secret" -- the keys that make its music -- is right there under the player's hands.

This riddle is filed under "What Am I?" Riddles and rated Medium.