Manually run the pseudo$-$code given that each successive number, $2,3,4,$dots represents an iteration of the "while" loop.

The contents of open and closed at the seventh iteration would be

Select one:

a$.7.$ open $=[H,$I,$J,K,L,M,N]$; closed $=$

$G,F,E,D,C,B,A$

b$.7.$ open $=[G,H,$I,$J,K,L,M]$; closed $=F,E,D,C,B,A$

c$.7.$ open $=[T,F,C,D]$; closed $=[L,S,K,E,B,A]$

d$.7.$ open $=[S,L,F,C,D]$; closed $=[K,E,B,A]$