For Most Metazoans, What is the Name of the Innermost

Question

For most metazoans, what is the name of the innermost tissue layer during development?
A) mesoderm
B) endoderm
C) ectoderm

Accepted Answer

The endoderm is the innermost layer of cells or tissue of an embryo in early development. It gives rise to the lining of the digestive and respiratory systems, among other structures.