Task: Class Relation Understanding (ontology: Sciences/Biology)

Which of the following classes is one valid superclass of 'positive regulation of alkane biosynthetic process'?

A. positive regulation of biosynthetic process
B. 2',3'-cyclic GMP-AMP synthase activity
C. 1-acylglycerol-3-phosphate O-acyltransferase activity
D. 2-oxobutyrate catabolic process

Answer: positive regulation of biosynthetic process