In Comparing the Development of the Unwebbed Foot of the Chicken

Multiple Choice

In comparing the development of the unwebbed foot of the chicken and webbed foot of a duck,what differences are there in the expression of
BMP4 and gremiln?

A) Chicken feet only express BMP4 while duck feet only express gremiln.
B) BMP4 is expressed similarly in both chicken and duck feet,while gremlin is only expressed in duck feet.
C) Gremlin is expressed similarly in both chicken and duck feet,while BMP4 is only expressed in between chicken digits.
D) Both BMP4 and gremlin are expressed similarly in chicken and duck feet.
E) BMP4 is expressed similarly in both chicken and duck feet,while gremlin is not expressed between the digits of chicken feet.