CR 7

Many marine organisms defend themselves from predators, using a dark ink-like pigment secreted from an inch-long sac attached to their epidermis. A fossil from the Jurassic period, dated at almost 155 million years old and discovered in the Wiltshire region, contains a perfectly-preserved ink-sac that was probably from a now-extinct species of squid, the Belemnotheutis Antiquus, whose exact origins had not been previously established. Therefore, this form of self-preservation in marine organisms is at least 155 million years old. 

Which of the following, if true, most strengthens the conclusion above?

A. Ink-sacs in marine organisms have functions other than self-preservation.
B. The Belemnotheutis Antiquus had physiological features that exist only as inactive organs in some present-day species of squid.
C. Marine organisms other than squids also have epidermal ink-sacs that the organisms use to ward off predators.
D. Fossils found in the Wiltshire region have previously provided evidence that land-based organisms from the Jurassic period had epidermal organs with the function of self-preservation.
E. Remains of a squid belonging to the Belemnotheutis Antiquus family were also found in the Wiltshire region and estimated to be from the Jurassic period.