Which of the Following Statements Is TRUE Regarding Cycads

Which of the following statements is TRUE regarding cycads?

A) Cycads are classified as gymnosperms; many cycads are considered to be "threatened" species and may eventually become extinct.
B) Cycads are only found in nutrient-rich environments, given that their roots produce antibiotic-like compounds that prevent symbioses between cycads and bacteria.
C) The pith and cortex of cycads are remarkably small. As a result, cycads are typically small in diameter and low to the ground.
D) Cycads are very susceptible to fire. Because these plants cannot survive wildfires, the populations of cycads across the globe have become fragmented.
E) Cycads are the most diverse group of gymnosperms, with twice the number of species compared with the conifer group.