Here's a problem to solve: Paramecium and volvox can both reproduce sexually. How is sexual reproduction in volvox different than sexual reproduction in paramecium?

Among the 4 following options, which is the correct answer?

- A: Volvox colonies produce gametes.
 
- B: Volvox cells undergo conjugation.
 
- C: Volvox colonies produce single-celled offspring.
 
- D: Volvox cells reproduce by vegetative budding.
 