[单选题]
By how many newtons does the weight of a 100-kg person change when6(7e k6ep-rn pxpus+k9m dkq5 he g12alhs ham rpd1-o*7woes from sea level to an altitude of 5000 m? (The mean radius of the E7ar slpdh1*ho2-a wm1arth is $6.38 \times 10^{6} \; m$.)
A. $0.6 \; N$
B. $1.6 \; N$
C. $2.6 \; N$
D. $3.6 \; N$
