Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

All of the following are characteristics of preference shares except:
Option A:They are either callable or putable.
Option B:They generally do not have voting rights.
Option C:They do not share in the operating performance of the company.

Answer: A