What is necessary for a eukaryotic RNA to be recognized and bound by the small subunit of the ribosome?

A) Sufficiently large 5' UTR for ribosome scanning.
B) Presence of an AUG start codon near the 5' end of the mRNA.
C) Formation of the pre- initiation complex before ribosome binding.
D) Presence of 5' methyl- G cap on the mRNA.
E) Formation of the initiation complex before ribosome binding.