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

Which of the following definitions best describes 'Composite Unit'?

A. The the concept (symbol: Pa) is the SI derived unit of pressure. It is a measure of force per unit area, and defined as one newton per sqare meter.
1 Pa = N m-2
B. A the concept raises a base or prefixed unit to an integer power other than 0 or 1. For example, the unit 'square meter' is a unit derived from the 'meter' base unit raised to the power 2. As another example, a 'square centimeter' is a unit derived from the 'centimeter' prefixed unit raised to the power 2.

BRL 20160601: I removed this restriction so that CompositeUnits like XXXPerLiter would not reason to owl:Nothing. hasUnit exactly 1 (BaseUnit or PrefixedUnit)
C. A the concept is one nautical mile per hour, which is equal to exactly 1.852 km/h and approximately 1.151 mph.
D. A the concept is the product of at least two base or derived units. For example, 'meter per second square' denotes a the concept defined over 'meter' (a base unit) and 'per second square' (a derived unit).

Answer: A the concept is the product of at least two base or derived units. For example, 'meter per second square' denotes a the concept defined over 'meter' (a base unit) and 'per second square' (a derived unit).