A small rectangular pyramid­ shaped metal object made of a single metal is found in an archaeological dig. Because of the metals available to the area’s inhabitants at the time, scientists believe the metal could be either iron, lead, nickel, or silver. The weight of the object is 612.4 grams. The rectangular base of the pyramid is 3 cm by 6 cm and the height is 9 cm. The density for each metal is shown below: Iron: 7.874 grams/cm 3 Lead: 11.34 grams/cm 3 Nickel: 8.908 grams/cm 3 Silver: 10.49 grams/cm 3 Select the metal shown below that was used to construct the small rectangular pyramid-shaped metal object found in the archaeological dig. A. Iron C. nickel B. Lead D. silver