Some Viruses Have Phospholipid Membranes Around Them,just Like Living Cells

Some viruses have phospholipid membranes around them,just like living cells.They are not cells,however,because they do not contain _________.

A) structural proteins
B) nucleic acid genetic material
C) ribosomes for protein synthesis
D) both structural proteins and ribosomes for protein synthesis
E) both nucleic acid genetic material and ribosomes for protein synthesis