It can be said that grammatically the correct answer would be itself because we are referring to an object and not to a person. However, in the case of the <span>Bicentennial Man." the robot is personified, in fact, it seems to be alive and it possesses human characteristics and behavior so if you use himself, it is not completely wrong, that would depend on the interpretation you get from the movie. </span><span> </span>
Sentence fluency refers to the ease with which words and groups of words flow when read or spoken, so the best answer is "Combining sentences to use complex structure" although that's not a great definition.
I think German healthcare workers resumed the T4 program becuase it is cruel to keep people alive who cant tell you they want to be alive, it is like keeping dogs alive who are in immense pain and are unable to be cured.