"SQL Injection Attacks" Have Been Responsible for Many Cases of Data

Multiple Choice

"SQL injection attacks" have been responsible for many cases of data theft.One of the solutions for preventing these attacks is:

A) Never use double quotes in the query.
B) Never use single quotes in the query.
C) Never add a string to a query that you didn't type yourself.
D) Never add a number to a query that you didn't type yourself.