Which one of the following statements allows for variable substitution?
A. $sql=qq{SELECT * FROM MyDatabase WHERE state=$state};
B. $sql=q{SELECT * FROM MyDatabase WHERE state=$state};
C. $sql=q{SELECT * FROM MyDatabase WHERE state=$state};
D. $sql=qq{SELECT * FROM MyDatabase WHERE state=$state};
Answer:A
Which one of the following statements allows for variable substitution?
A. $sql=qq{SELECT * FROM MyDatabase WHERE state=$state};
 B. $sql=q{SELECT * FROM MyDatabase WHERE state=$state};
 C. $sql=q{SELECT * FROM MyDatabase WHERE state=$state};
 D. $sql=qq{SELECT * FROM MyDatabase WHERE state=$state};
