![](https://cos-cdn.shuashuati.com/pipixue-web/2020-1231-2005-12/ti_inject-812ce.png)
A vegetarian could die from insufficient protein ingestion if he or she ______.
A.
did not follow a varied and properly protein-complemented diet.
B.
ate too many animal proteins, and could not digest them properly.
C.
did not follow a diet in which nonessential proteins were ingested.
D.
ate too many low-quality proteins.