C is not correct, it's not near-real time

All other options are technically correct:
A) Heroku Connect + Heroku Postgres can be leveraged to accomplish near-real time sync between orgs
B) A 3rd party tool could be used for this end
D) Other middleware tools could also be used
E) Allows viewing data from the other org's records in near-real time. The caveat here is that the records are not actually synced, it only shows the records from the other org, in read-only mode.

Since C is discarded and E is the most different one due to that technicality, I'd go with ABD. Still, the question is ambiguous as per what exactly is implied by "bidirectionally share".

Right answer is CDE

BDE seems the correct ones

I dont try think A is correct as nothing said that opportunities in heroko postgree db , so i think B,D , E or B,C , D