[ Tenses ]
In recent decades, the efficiency of the United Nations …………….. by a growing number of countries
A. will have been questioned
B. would be questioned
C. has been questioned
D. had been questioned

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It is not known by many criminal defendants that most public defenders are overworked.
A. It is not known by many criminal defendants that the system overworks most public defenders.
B. Many criminal defendants do not know that most public defenders are overworked.
C. Few criminal defendants know that most public defenders are overworked.
D. Few criminal defendants know that public defenders are themselves victims of heavy workloads.