The first diagram below shows the levels of mRNA from two different genes (bicoid and caudal) at different positions along the anterior-posterior axis of a Drosophila egg immediately before fertilization. The second diagram shows the levels of the two corresponding proteins along the anterior-posterior axis shortly after fertilization.

Which of the following conclusions is best supported by the data?

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Before fertilization, the caudal mRNA concentration is evenly distributed. After fertlization, it appears as though the caudal mRNA is only translated into protein in the posterior region of the egg. The Bicoid protein likely prevents translation in the anterior region.

THe other choices can be safetly eliminated. If Bicoid protein stabilizes the caudal mRNA, it would be more reasonable to see Caudal mRNA or protein present in greater quantities in the anterior region.

If translation of bicoid mRNA resulted in caudal protein, the second image should show caudal protein on the anterior end.

If Caudal protein stimulates development in the anterior region, we expect to see the protein in the anterior end.