There has just been an update to Oracle Management Cloud (OMC).
What is the sequence of actions when upgrading a data collector agent?
A.
Stop the agent, open the OMC Agents webpage, click the Data Collectors tab, click the Upgrade All button,
and restart your agent.
B.
Open the OMC Agents webpage, click the Data Collectors tab, select your agent, and click the Upgrade
button.
C.
Open the OMC Agents webpage, confirm that the upgrade is available, and click the Upgrade All button.
D.
Stop the agent, open the OMC Agents webpage, click the Data Collectors tab, select your agent, and click
the Upgrade button.
Explanation:
https://docs.oracle.com/en/cloud/paas/management-cloud/emcad/upgrading-oracle-managementcloud-agents1.html
i think it is B, because the question talking about upgrade one agent not multiple agents.
(Installing and Managing Oracle Management Cloud)(p5-3)