_____ were common ocean scavengers long ago, and they are frequently found in fossilized form.
A. Trilobites
B. Ammonites
C. Foraminifera
D. Stromatolites
It would be "A. Trilobites" who were common ocean scavengers long ago, and they are frequently found in fossilized form, since these are some of the earliest forms of documented life on earth.
