What kind of penetration test did Fred ask the third-party penetration testing team to perform?

Fred, who owns a company called Skyfeit Ltd., wants to test the enterprise network for presence of any vulnerabilities and loopholes. He employed a third-party penetration testing team and asked them to perform the penetration testing over his organizational infrastructure. Fred briefed the team about his network infrastructure and provided them with a set of IP addresses on which they can perform tests. He gave them strict instruction not to perform DDoS attacks or access the domain servers in the company. He also instructed them that they can carry out the penetration tests even when the regular employees are on duty since they lack the clue about the happenings.

However, he asked the team to take care that no interruption in business continuity should be caused. He also informed the penetration testing team that they get only 1 month to carry out the test and submit the report.

What kind of penetration test did Fred ask the third-party penetration testing team to perform?
A . Announced testing
B . Blind testing
C . Grey-Box testing
D . Unannounced testing

Answer: D