Which one of the following formulas is correct for determining the critical price on a long stock position?
A. P = (Amount borrowed / Number of shares) / (1 - Maintenance margin)
B. P = (Amount borrowed / Number of shares) / (1 + Maintenance margin)
C. P = (Amount borrowed / Number of shares) / (Maintenance margin)
D. P = (Amount borrowed / Number of shares) / (Initial margin - Maintenance margin)
E. P = (Amount borrowed / Number of shares) / (1 + Initial margin)