Which of the following is least likely to be the speaker of the excerpt below?
The discovery of the trails was immensely exciting - something extraordinary that I could hardly take in or comprehend its implications for some then again, there was an immediate impact in the vastness of our discovery because from a very early stage it was clear that we had before us unique establish that our hominid ancestors were fully bipedal (an upright walker) a little before 3.5 million years ago.

a. An anthoplogist
b. A psychologist
c. A paleontologist
d. An archaeologist