What is 'had not' in this sentence?​

What idea-generating technique allows members to intentionally develop unconventional or outlandish ideas? brainstorming

Read this passage from the online article “top 10 reasons why everyone is doing yoga” by kathryn livingston. what type of propaganda is the author using? why are so many people doing yoga these days? there must be more to it than endorphins; there has to be a deeper reason why 20 million plus americans have fallen in love with this venerable practice. here is my top ten list – and if you’re a yogi, i’m sure you can think of more.

The compass tests are tools used: a. when students are preparing for the act or sat. b. in lieu of the act or sat. c. when students score extremely high on the act or sat. d. to determine which level of classes a student should be placed in.