Answer:
Option-(A):
The arms have many young stars and the central region has older stars.
Step-by-step explanation:
The spiral galaxy is a form of galaxy in which there exist a number of stars on the flat, rotating arms or disks of galaxy. As there are dust particles along with some energy with it.Along with that it also posses a number of the black wholes present on its arms.As it has a number of older stars forming a more bulge of stars in the center of the galaxies structure.