Secondary growth in plants refers to the increase in thickness or girth of the plant, which occurs due to the activity of the lateral meristems, namely the vascular cambium and the cork cambium. The vascular cambium produces secondary xylem (wood) and secondary phloem, while the cork cambium produces cork cells that form the bark. Which of the following statements about secondary growth is correct?
a) It occurs in all plants, including herbaceous and woody plants.
b) It results in the formation of annual rings in the stems of woody plants.
c) It involves the production of primary xylem and primary phloem.
d) It takes place only in the roots of dicot plants.