Enzyme that catalyzes the phosphorylation of fructose

Phosphofructokinase-1 (PFK-1) is a large enzyme that catalyzes the phosphorylation of fructose 6-phosphate during glycolysis. In fungi, the PFK-1 enzyme is composed of four alpha subunits and four beta subunits. How would you describe the quaternary structure of PFK-1? (2pts) A. aß heterodimer B. heterotetramer C. α4β4 homotetramer D. daf4 homooctamer E. a4ßs heterooctame