The correct answer is C. Criteria cannot be specified as an expression.
A criteria is a condition that is used to select or exclude certain records from a query. It can be specified as a simple text string, a regular expression, or a Boolean expression.
A simple text string is a literal string that is used to match a specific value in a field. For example, the criteria “John Doe” would match any record that has the value “John Doe” in the “Name” field.
A regular expression is a pattern that is used to match a set of values in a field. For example, the regular expression “.*@gmail.com” would match any record that has an email address that ends in “gmail.com”.
A Boolean expression is an expression that evaluates to true or false. For example, the expression “Age > 18” would match any record where the value in the “Age” field is greater than 18.
Multiple criteria can be specified using AND, OR, and relational operators. For example, the criteria “Age > 18 AND Name = ‘John Doe'” would match any record where the value in the “Age” field is greater than 18 and the value in the “Name” field is “John Doe”.
The statement “Criteria cannot be specified as an expression” is not true. Criteria can be specified as a simple text string, a regular expression, or a Boolean expression.