【单选题】Across the OECD pupils in public schools score lower in science than students in private schools do. But this is not the case once you account for the economic and social background of pupils.
A.
Afro-Americans account for 12% of the US population.
B.
Recent pressure at work may account for his behavior.
C.
In 1965, for instance, Japan used approximately 13 million gallons of water to produce $q million of commercial output; by 1989 this had dropped to 3.5 million gallons (even accounting for inflation)