In the last sentence, what does It refer to? ...

[ Grammar ]

In the last sentence, what does It refer to?

Most of the searching performed on the internet utilises Boolean logic. Boolean logic refers to the logical relationships among search terms and is named after the British mathematician George Boole. It allows you to combine search terms using and, not and or.

A. the searching

B. the internet

C. Boolean logic

D. the logical relationships

Select your answer:
A B C D E

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