Which of the underline expressions is the hedging of the following sentences.Conceivably, different forms, changing at different rates and showing contrasting combinations of characteristics, were present in different areas.

A、Conceivably, different forms, changing at different rates and showing contrasting combinations of characteristics, were present in different areas.;
B、Conceivably, different forms, changing at different rates and showing contrasting combinations of characteristics, were present in different areas.;
C、Conceivably, different forms, changing at different rates and showing contrasting combinations of characteristics, were present in different areas.;
D、Conceivably, different forms, changing at different rates and showing contrasting combinations of characteristics, were present in different areas.