[单选题]
An electron is knownwi e*b. */9v ym9o s8kwz)cdtl to be confined to aua8, //svchx9i (y; 6bpne row region of width 0.1 nm. What is an approximate expression for the leasth6p iy;(9ura s8/b vcxon, we/ kinetic energy it could have, in eV?
A. $2.7 \; eV$
B. $3.2 \; eV$
C. $3.8 \; eV$
D. $4.3 \; eV$
