In a survey of 10 film historians, half voted for nosferatu as the greatest vampire film ever made, and the other half voted for dracula. however, when asked which lead vampire character they considered more charismatic, all of the film critics chose dracula over nosferatu.
based on the information above, it must be true that for some film critics, their feelings about the charisma of the lead character (points : 1)
is the least important factor they consider when comparing two filmsis the most important factor they consider when comparing two filmsis not the most important factor they consider when comparing two filmsis the only factor they consider when comparing two film

is not the most important factor they consider when comparing two films

Explanation:

The first option is wrong logically in that, while the charisma of the lead character is not the most important factor considered, it is definitely not stated as the least as other factors are also considered.

The second option is also wrong in that if the charisma of the lead character is the most important factor considered, more than 5 out of the 10 critics would have also voted Dracula as the greatest vampire movie ever made.

The last option is wrong  in that if the charisma of the lead character is the most important factor considered, all 10 critics would have also voted Dracula as the greatest vampire movie ever made.