Which statement does NOT describe subduction zones? A.
Earthquakes and volcanoes occur at these boundaries.

B.
Old crust is recycled into Earth's mantle.

C.
Volcanic mountains can form at these boundaries.

D.
New crust forms by seafloor spreading

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the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3