An astronomer is a guest speaker at your school. She states that iron is the very last product in stellar fusion. Why would she say that? Why wouldn’t elements in stars fuse to make larger atoms than iron? select one:
a. The star’s core has no more room left in the interior to fuse larger nuclides

b. It takes much more heat than the star has in its core to fuse iron with another atom.

c. Iron has a tightly bound nucleus, and atoms larger than iron are less stable and tend to undergo nuclear fission.

d. Iron is a metal, and metals cannot undergo fusion.