If \[2.5+0.5-\left[ 1.6-\left\{ 3.2-\left( 3.2+2.1\div K \right) \right\} \right]=0.65\] find K=?

If \[2.5+0.5-\left[ 1.6-\left\{ 3.2-\left( 3.2+2.1\div K \right) \righ

1.	If \[2.5+0.5-\left[ 1.6-\left\{ 3.2-\left( 3.2+2.1\div K \right) \right\} \right]=0.65\] find K=?
A.	\[0.09\]
B.	\[0.7\]
C.	\[7\]
D.	\[~2.8\]
Answer» E.