---______ is the population of the town?
---Over 20,000. And a third of the population ____ workers of the car factory.

---______ is the population of the town?
---Over 20,000. And a third of the population ____ workers of the car factory.

1. A.
   What, are
2. B.
   How many , are
3. C.
   What , is
4. D.
   How many, is