Gouldian finch chicks (thanks to phosphorescent beads on the edges of their mouths—are easy to feed in the dark.

Question

Choose 1 answer:
Choose 1 answer:
(Choice A) NO CHANGE
A
NO CHANGE
(Choice B) mouths
B
mouths
(Choice C) mouths)
C
mouths)
(Choice D) mouths,
D
mouths,

Answer 1

The best option is:

(Choice D) mouths,

This option correctly uses a comma to separate the phrase for clarity.