1.4 Which of the following are true:
- Metacharacters are a specialized representation that do not self-match in the context of a regular expression. Instead, they are used to identify or change the meaning of an expression.
- Regular expressions are an effective way to do pattern matching.
- "B" is an example of a metacharacter.
- A simple regular expression can encapsulate all types of email address formats.
- Regex is useful for parsing HTML and navigating the DOM structure.