Question

a precious metal is
a. an element with super and electric and thermal conductivity, high luster, and sensitivity.
b. a highly sought after dense, shiny, soft precious metal that has been used as money for many centuries.
c. an highly valuable element with super and electric and thermal conductivity, high luster, and sensitivity.
d. a soft, sensitive, and lustrous element with the highest conductivity of any element.
please select the best answer from the choices provided
a
b
c
d

Explanation:

Precious metals are highly valuable elements. They have properties like good electric and thermal conductivity, high luster. Option a misses the "highly valuable" aspect. Option b is too narrow as it only focuses on being used as money (though some precious metals were used as money, it's not the full definition). Option d is incorrect as the metal with the highest conductivity is silver (a precious metal but the option's description is too specific and not a general definition of precious metal). Option c correctly combines the key elements of being a highly valuable element with the mentioned properties.

Answer:

C. an highly valuable element with super and electric and thermal conductivity, high luster, and sensitivity.