Task: Instance Description Understanding (ontology: Business_Finance/Financial_Industry_Business_Ontology)

Which of the following definitions best describes the instance 'NYSE Dark'?

A. date that the Chicago Board Options Exchange was established
B. the instance segment-level market that is a segment of the NYSE involved in trading of dark pools
C. the instance functional entity that is an electronic stock market, supporting trading of equity securities and options products listed in the United States, including trading exchange-traded funds (ETFs) and exchange-listed securities
D. NYSE (New York Stock Exchange) American Options segment-level market that is an options trading platform under the name AMEX options exchange which facilitates trading of the options on domestic stocks; American depository receipts; broad-based, industry sector, and international indexes; exchange traded funds; HOLDRS; LEAPS; and equity and index FLEX options

Answer: the instance segment-level market that is a segment of the NYSE involved in trading of dark pools