What Is It? #1

This interesting-looking object was photographed using the scanning electron microscope at Mount Allison's Digital Microscopy Facility (DMF). It is only 80 microns (0.08 millimeter) long. Your job is to correctly identify this object from the list of choices below:

A. A microscopic plant commonly found in the Moncton water supply

B. A microscopic plant commonly found in the Sackville water supply

C. A microscopic plant commonly found in the Pacific Ocean

D. A hair follicle from the extinct woolly mammoth

E. A grain of pollen from grass on the Tantramar Marsh