All of the cells are in the very early stages of embryonic development and have not begun to differentiate into specialized types of cells. what type of cells would these be?

These are stem cells. Stem cells are cells that have not differentiated into specialized cells. In other words, they are "blank slates." Eventually, certain genes will be expressed and the cells will differentiate into cells, tissues, and organs with special functions.

lysosome is this part of the cell is surrounded by a very thick outer membrane to protect the rest of the cell from its strong enzymes.

i believe your answer would be c.. : )