Xylem and phloem together make up:
All of these
The correct option is D:
Explanation of the correct options :
Option A:
Xylem and phloem form the transport system in vascular plants. Hence, together they are known as vascular bundles.
Option B:
Their main function is to conduct water and food material to different parts of the plant. Thus, they are also called conducting tissues.
Option C:
Xylem and phloem tissues are made up of more than one type of cells. Hence, they are complex permanent tissues.
Final answer: Xylem and phloem together make up: Vascular bundles, conducting tissues, complex tissues - All of these.