28. 橋腦小腦纖維(pontocerebellar fibers)經由下列何處投射入小腦？ (A)上小腦腳(superior cerebellar peduncle) (B)中小腦腳(middle cerebellar peduncle) (C)下小腦腳(inferior cerebellar peduncle) (D)髓紋(stria medullares)