Make p the subject of the formula $y = {a + p}/{a - p}$

• A.p = (2a - y)/{a(y - 1)}
• B. p = (ay - 1)/(ay)
• C. p = (a + y)/(y + 1)
• D. p = (y + 1)/(y + a)
• E. p = (2y - 1)/(y - 1)