The correct answer is: C. Wild card character
A wild card character is a special character that can be used to represent one or more characters in a search string. For example, the asterisk (*) can be used to represent any number of characters, and the question mark (?) can be used to represent any single character.
Logical operators are used to combine two or more search conditions into a single search string. For example, the AND operator can be used to require that both search conditions be met, and the OR operator can be used to require that either search condition be met.
Relationships are used to specify the relationship between two or more search terms. For example, the NEAR operator can be used to require that two search terms appear near each other in the search results, and the IN operator can be used to require that a search term appear in a specific list of terms.
Comparison operations are used to compare two or more search terms. For example, the EQUAL TO operator can be used to require that two search terms be equal, and the NOT EQUAL TO operator can be used to require that two search terms not be equal.