BASH Scripting

Which of the following is not true about this invocation of echo and its output;

echo -e "I'd buy that for $1!" I'd buy that for !

a. The positional parameter is empty

b. The -e option tells echo to expand the $1 variable name

c. The $ character can be escaped to allow the original string to be rendered

d. The shell is removing the $1 before echo evaluates the string