[单选题]
By how much will a szqtxu,nx u549 l/5 dzkz-*kq uuab of concrete 18 m long contract when the temperature drops fkd-kqz uz/* u5rom $24 \; ^{\circ}C$ to -$16 \; ^{\circ}C$? (The coefficient of linear thermal expansion for concrete is $10^{-5} \; ^{\circ}C^{-1}$)
A. $0.50 \; cm$
B. $0.72 \; cm$
C. $1.2 \; cm$
D. $1.5 \; cm$
