[单选题]
An object is on a frictionless inclined planf009 askc3f 6y)hm2g. d 7usyuofus.ne.i d gda0e/8/k)6qq9q x2 nazwg The plane is inclined at an angle odn/02 a z/gwdeg9q8x a)k6iqqf $30^{\circ}$ with the horizontal. What is the object's acceleration?
A. $0.50 \; g$
B. $0.56 \; g$
C. $0.87 \; g$
D. $1.0 \; g$
