What Is the Primary Source of ATP Production in Ultra

Multiple Choice

What is the primary source of ATP production in ultra short-term (high intensity) exercise performances (i.e. ,exercise lasting less than 10 seconds) ?

A) oxidative phosphorylation
B) phosphocreatine (i.e. ,ATP-PC system)
C) equal ATP production is derived from glycolysis and oxidative phosphorylation
D) equal ATP production is derived from phosphocreatine and oxidative phosphorylation