​Women with PKU Must Avoid the Essential Amino Acid Phenylalanine

​Women with PKU must avoid the essential amino acid phenylalanine and consume a diet low in protein because _____.

A) ​they lack enough stomach acid (HCl) to break down dietary proteins,including phenylalanine
B) ​they are allergic to phenylalanine and other protein-rich foods
C) ​they lack the enzyme necessary to convert phenylalanine to tyrosine
D) ​phenylalanine and protein-rich foods cause an accumulation of acid to build up in the blood
E) ​they are unable to incorporate phenylalanine into proteins,so it builds up in the blood,potentially blocking blood vessels