Which Cisco IOS configuration option instructs the IPS to compile a signature category named ios_ips into memory and use it to scan traffic?

Which Cisco IOS configuration option instructs the IPS to compile a signature category named ios_ips into memory and use it to scan traffic?

• R1(config)# ip ips signature-category
  R1(config-ips-category)# category all
  R1(config-ips-category-action)# retired false
• R1(config)# ip ips signature-category
  R1(config-ips-category)# category ios_ips basic
  R1(config-ips-category-action)# retired false
• R1(config)# ip ips signature-category
  R1(config-ips-category)# category all
  R1(config-ips-category-action)# enabled true
• R1(config)# ip ips signature-category
  R1(config-ips-category)# category ios_ips basic
  R1(config-ips-category-action)# enabled true

Exam with this question: CCNA Security Chapter 5 Exam (CCNAS v1.2)
Exam with this question: CCNA Security Final Exam (CCNAS v1.2)