Task: Class Definition Understanding (ontology: Earth_Environment/SWEET)

Which of the following definitions best describes 'armoured relict crystal'?

A. constituent occurs as a collection of particles that are characterized by average properties of the individual particles
B. Constituent forms a rigid arrangement of particles that support one another at their points of contact...constituting a mechanically firm structure capable of supporting open pore spaces, although interstices may be occupied by cement or matrix
C. a crystal of an earlier rock that is prevented from further reaction in a later rock by a rim of reaction products
D. Constituent forms an interconnected network of discernible crystals.

Answer: a crystal of an earlier rock that is prevented from further reaction in a later rock by a rim of reaction products