Which of the following is true according to the passage?
Though planting mums close together can make them look more beautiful, enough space should be left.
The petals of mums are long and straight and the more water mums get, the more quickly they grow.
Growing mums has a very long history and all the people in the world like making tea with mums.
Mums can grow one meter high and the closer they are planted, the higher they grow.