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

Which of the following definitions best describes 'inclusion'?

A. A hard, compact mass or aggregate of mineral matter, normally subsperical but commonly oblate, disc-shaped or irregular. Formed by precipitation of mineral from solution in the pores of a granular rock, localized around a nucleus or center, to define a discrete, sharply separated object. Size ranges from cm to decimeter for application as a compoundMaterialConstituentPart; larger concretions should be considered GeologicUnit parts.
B. Constituent occurs as a concentric envelope enclosing another constituent. the concept is a non-genetic term.
C. Constituent crystallized in crystallographic continuity with some other mineral constituent, typically quartz or calcite. In a clastic rock, commonly forms cement as well, but this should be represented using two role attribute links, 'the concept' and cement, because the concept does not necessarily imply cement.
D. A fragment of older material within an igneous rock to which it may or may not be genetically related.

Answer: A fragment of older material within an igneous rock to which it may or may not be genetically related.