It Is Suggested That Bamboo Used for Decorative Purposes Be

It is suggested that bamboo used for decorative purposes be planted in deep underground containers.What is the reason for this suggestion?

A) The bamboo plants need containment of their root systems to grow properly.
B) If not contained, bamboo plants will spread vegetatively via rhizomes and eventually fill the entire yard.
C) If not contained, the bamboo plants will spread sexually via bulbs to fill the garden.
D) If grown this way, bamboo plants will disperse less because growing seeds dropped from the plants will be better contained.
E) This will starve the plants, and they will not spread as easily.