Read the text and determine if the sentence is true (see options at the end):

How to divide and transplant daylilies<br>Choose the time of year you want to divide your daylilies. It is best to divide them in early spring before they begin their yearly growth or wait until late summer when flowering is done. Whenever you choose to divide the plants, they may not produce flowers the first summer, or may produce fewer flowers than normal.

Sentence: perennial plants can be divided after flowering
Choose your answer from:
 a). Yes.
 b). It's impossible to say.
 c). No.