The Following Question Is Based on the Figure Below

Multiple Choice

The following question is based on the figure below. Which of the following must have occurred during development in the region between the root and stem circled on this diagram of an herbaceous eudicot?

A) the endodermis in the root must convert into the epidermis of the stem
B) the xylem in the root must split into separate strands in the stem
C) each vascular bundle of the root spreads as it moves up into the stem
D) the parenchyma core of the root is continuous with the pith of the stem