Compared to stars like the Sun in the disk of the Milky Way, stars that populate the extended spheroidal halo of the galaxy were born
a) earlier, so have had time to accumulate more heavy elements
b) later, so have used up their heavy elements
c) earlier, from more nearly primordial material, so have fewer elements
d) later, so have accumulated more heavy elements from previous generations of stars
Answer: c) earlier, from more nearly primordial material, so have fewer elements