HOTSPOT
You are the Office 365 administrator for your company’s Microsoft Exchange Online
environment. The company recently subscribed to the Office 365 Enterprise El plan.
The company wants to filter email messages based on the following criteria:
Reverse DNS lookup
Sender open proxy test
HELO/EHLO analysis
Analysis of spam confidence level (SCL) ratings on email messages from a specific sender
You need to filter all email messages.
How should you complete the relevant Windows PowerShell script? To answer, select the
appropriate command segment from each list in the answer area.
Answer: 
Explanation:
Correct
See https://technet.microsoft.com/en-us/library/bb125186(v=exchg.150).aspx
Incorrect, none of these cmdlets are even available for Exchange online, and the link provided by Luis leads to a Exchange 2013 technet page.
Actually, I would say the answer is right, but the whole question does not apply to office 365, but to exchange 2013.
Correct: The only answer that has all parameters and also has OpenProxyDetectionEnabled is Set-SenderReputationConfig
This is a tough one and I think the question may not have been posted correctly. For Exchange Online none of the following cmdlets are present:
Set-SenderReputationConfig
Set-IPAllowListProvider
Set-SenderFilterConfig
If we are talking about Reverse DNS lookup, Sender open proxy test, HELO/EHLO analysis, and SCL ratings then Set-SenderReputationConfig is your cmdlet.
https://technet.microsoft.com/en-us/library/bb124512(v=exchg.150).aspx