Which statement is true about using ConnectApi namespace (also called Chatter in Apex)? (Choose two.)

Which statement is true about using ConnectApi namespace (also called Chatter in Apex)? (Choose two.)
A . Chatter in Apex methods honor the ‘with sharing’ and ‘without sharing’ keywords
B . Chatter in Apex operations are synchronous, and they occur immediately
C . Chatter in Apex methods do not run in system mode; they run in the context of the current user
D . Many test methods related to Chatter in Apex require the IsTest (SeeAIIData=true) annotation

Answer: C,D