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

Which of the following definitions best describes the instance 'calendar quarter'?

A. time interval resulting from the division of a calendar year in 12 time intervals, each with a specific name and containing a specific number of calendar days
B. time interval of 3 months, starting on January 1, April 1, July 1, or October 1
C. time interval of seven calendar days starting on a Monday
D. cyclic time interval in a calendar which is required for one revolution of the Earth around the Sun and approximated to an integral number of calendar days; a year in the Gregorian calendar

Answer: time interval of 3 months, starting on January 1, April 1, July 1, or October 1