>>194
次の場合なら、"which of the 名詞 ★are★..." と言える。

(1) We don't know ★which of the options are★ better.
(USA, 2011)
http://www.myelomabeacon.com/news/2011/02/28/thought-leader-perspective-dr-kenneth-anderson-on-the-future-of-multiple-myeloma-treatment/

(2) After surveying the list of vetted retail REITs and considering
★which of the companies are★ worthy of ownership, I find Retail Opportunity
Investments Corp. (ROIC) one of the best REITs to own, and....
(USA, 2017)
https://seekingalpha.com/article/4080962-abcs-roic