[单选题]
An object is 5.7 cm from a concave/2,uazyj hx vvv2*gh2 mirror. The image is 4.7 cm tall, andnm86 0v gro7 m)a5rs ( lk2i9dja3phfw 10 cm faf 67j5ki drh2nm3 a 8 l90opws(grv)mrom the mirror. How tall is the object?
A. $12 \; cm$
B. $11 \; cm$
C. $8.2 \; cm$
D. $2.7 \; cm$
