A security guard working at a retail store observes a shopper conceal merchandise and attempt to leave without paying. Under which section of the Criminal Code of Canada can the security guard make a citizen's arrest?

1. Section 494(1)(b) - as the owner or a person in lawful possession of property, or a person authorized by them.
2. Section 495 - as a peace officer making an arrest without a warrant.
3. Section 25 - as a person required or authorized by law to do anything in the administration or enforcement of the law.
4. Section 494(1)(a) - on reasonable grounds that a person has committed an indictable offence.