Frank liszt came up with a keyboard technique called

In fact it was called a harpsichord –

think of it as a harp (wooden frame with stretched strings) with a keyboard. Around 1700 the harpsichord gradually transformed into a pianoforte, which had the same look as the harpsichord, but instead of the strings being plucked they were hit by little leather-wrapped hammers.

Explanation:

answer; gordon allport; good luck

option c (nickel) is not found in earth's crust. the earth's crust basically contains eight (8) elements namely: oxygen, silicon, aluminum, iron, calcium, sodium, potassium and magnesium (listed in order of abundance).