Final answer:
TFIIIA is the transcription factor among the listed options that contains a zinc finger DNA binding domain, essential for the RNA polymerase III system in eukaryotes.
Step-by-step explanation:
The question pertains to the role of transcription factors in the RNA polymerase III system and which of them has a zinc finger DNA binding domain. Among the options listed in the question, TFIIIA is known to contain a zinc finger motif that allows it to bind to DNA. In eukaryotic transcription, various transcription factors, each denoted by 'TFII' followed by a different letter, recruit RNA polymerase to a gene's promoter to form the transcription initiation complex. TFIIIA's role is particularly important in the transcription of 5S rRNA genes by RNA polymerase III.