The tripartite leader found on all of the transcripts produced from the major late gene of adenovirus carries out which of the following functions?

A) It makes the mRNA more stable.
B) It binds to the eIF4F translation factor.
C) It shunts the ribosome to the correct AUG on the mRNA.
D) It assists with transport of the mRNA out of the nucleus.
E) It improves the efficiency of mRNA splicing.