Sequence order in Captivate 9

Hi !

I am developping an exercise for an evacuation procedure. It lists a certain number of sentences which correspond to various steps to be completed to achieve the process. The goal is to put these sentences in the correct sequence.

Is it possible to switch sentences, one by one, to arrive at the correct order?

Yet, any answer already at the right place should remain where it is. Participants should not be able to move it. How can this be achieved?

Thank you for your help.

Nicolas