what was the question asked by investigators to those being questioned during the McCarthy congressional inquiry?

Explanation:

Army–McCarthy hearings were a series of hearings held by the United States Senate's Subcommittee on Investigations (April–June 1954) to investigate conflicting accusations between the United States Army and U.S. Senator Joseph McCarthy

16.) true

17.) true

18.) no information in the text

19.) false

20.) no information in the text

  this riddles' answer is library.

  the "leaves" are a reference to the books' pages that the library contains; the branches are a network of libraries that connect multiple libraries' collections, resources, and items in a system of a common database, integrating them; the branches' organization are a useful management tool for coordinating the multiple collections many libraries have.