Which of these formulae is used for the corrector step of the two-level predictor-corrector method?

n+1= n+ ( frac{1}{3} ) [2f(tn, n )+f(tn+1, n+1*)] t

n+1= n+ ( frac{1}{2} ) [2f(tn, n )+f(tn+1, n+1*)] t

n+1= n+ ( frac{1}{3} ) [f(tn, n )+2f(tn+1, n+1*)] t

n+1= n+ ( frac{1}{2} ) [f(tn, n )+f(tn+1, n+1*)] t

Which of these formulae is used for the corrector step of the two-leve

1.	Which of these formulae is used for the corrector step of the two-level predictor-corrector method?
A.	<sup>n+1</sup>= <sup>n</sup>+ ( frac{1}{3} ) [2f(t<sup>n</sup>, <sup>n</sup> )+f(t<sup>n+1</sup>, <sup>n+1*</sup>)] t
B.	<sup>n+1</sup>= <sup>n</sup>+ ( frac{1}{2} ) [2f(t<sup>n</sup>, <sup>n</sup> )+f(t<sup>n+1</sup>, <sup>n+1*</sup>)] t
C.	<sup>n+1</sup>= <sup>n</sup>+ ( frac{1}{3} ) [f(t<sup>n</sup>, <sup>n</sup> )+2f(t<sup>n+1</sup>, <sup>n+1*</sup>)] t
D.	<sup>n+1</sup>= <sup>n</sup>+ ( frac{1}{2} ) [f(t<sup>n</sup>, <sup>n</sup> )+f(t<sup>n+1</sup>, <sup>n+1*</sup>)] t
Answer» E.