Task: SWRL-based Rule Reasoning (ontology: Earth_Environment/EnvironmentOntology)

Suppose an individual ?x satisfies: dicarboxylic acid monoester(?x). Which conclusion is one valid inferred conclusion?

A. carboxylic ester(?x)
B. carboxylic acid(?x)
C. organosulfonic acid(?x)
D. dicarboxylic acids and O-substituted derivatives(?x)

Answer: carboxylic acid(?x)