A Geneticist Introduces into the Human Germline the Genes for a Super-Spliceosome

A geneticist introduces into the human germline the genes for a super-spliceosome that is able to remove every intron without fail.In which way would people with this genetic innovation differ from the rest of the species?

A) They would have only one kind of histone.
B) They would produce fewer unique proteins.
C) They would transcribe fewer genes.
D) They would produce mRNA transcripts without cap and poly-A tail.
E) Their proteins would no longer be modified post-translationally.