Correct the phrase written in parentheses

The next morning, the biologist couldn’t find (the starfish he noticed) a pile of urchins against one wall of the aquarium; as he stirred them about, he saw the barely visible remains of the starfish.

Select one answer
A
NO CHANGE
B
the starfish, he noticed
C
the starfish. He noticed
D
the starfish he noticed,

C) the starfish. He noticed