A Eukaryotic Mutation Upstream of a Particular Gene Has Been

A eukaryotic mutation upstream of a particular gene has been identified that changes the sequence of the TATA box to GATA.How would you predict that this mutation would affect the transcription of this gene?

A) Transcription would proceed normally.
B) Transcription factors would bind to the start point in the promoter region.
C) Transcription factor binding would be reduced or eliminated,and transcription of the gene would decrease dramatically.
D) Transcription factors would bind in the middle of the gene sequence and transcribe the gene from that point.

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