What does the sign pictured above mean?
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a. skip to the last measure.
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b. this is bass clef music.
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c. this is the final measure.
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d. repeat the preceding music.

D.)

Explanation:

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).

g