You Find a Mutant Drosophila Larva That Is Lacking Anterior

You find a mutant Drosophila larva that is lacking anterior structures. You know that this embryo had normal amounts of Bicoid protein. What other type of mutation could cause this result?

A) A hunchback mutation that inhibits Hunchback production.
B) A hunchback mutation that causes Hunchback overproduction.
C) A maternal effect gene mutation that inhibits the production of a maternal gene product.
D) A segmentation gene mutation that inhibits production of a segmentation gene product.
E) A segmentation gene mutation that causes the overproduction of a segmentation gene product.