Task: Class Definition Understanding (ontology: Sciences/Biology)

Which of the following definitions best describes 'obsolete establishment of posterior gap gene boundaries'?

A. OBSOLETE. Any process that stops, prevents or reduces the frequency, rate or extent of glutathione peroxidase activity.
B. OBSOLETE. The process in which pressure natriuresis increases rate of natriuresis.
C. OBSOLETE. Specification of the borders of posterior gap gene expression mediated largely by the effects of other gap genes; in insects this is exemplified by hunchback and tailless repression of knirps.
D. OBSOLETE. The movement of nucleosomes along a DNA fragment.

Answer: OBSOLETE. Specification of the borders of posterior gap gene expression mediated largely by the effects of other gap genes; in insects this is exemplified by hunchback and tailless repression of knirps.