Since you have the luxuryLuxury? Yes, a luxury because, on a lab practicum, your instructor will expect you to figure out the primary tissue type on your own.
of already knowing this is epithelial tissue, determine how many layers of cells are between the open area (c) and the basement membrane (d).
Then focus on the shape of the cell that is filled with (a) and the placement of the dark-stained structure (b) inside each cell.