[单选题]
An acorn falls from a tree. Compare its kinetic energy K, to its 0/ur cs fafnckk6 my,v088oc )potential ener /6ccf8f08a)cm0k,sr ynokuvo b+bqjt22zb 40 m, y dt+is8(bcswg1/ybqp9 dgy U.st q1,y2y9 q4+8gbid(b2ptw/j +0so bcmbbzd
A. K increases and U decreases.
B. K decreases and U decreases.
C. K increases and U increases.
D. K decreases and U increases.
