Which of the following ISPs is free of cost?

ACompuServe

BAOL

CNetZero ✓ Correct

DNone of the above

Correct answer: (C) NetZero

Explanation

NetZero began as a free internet service provider supported by advertising rather than fees.

CompuServe was one of the earliest paid online services and charged its subscribers.

AOL was a major subscription-based provider, not a free one.

None of the above is wrong because NetZero did offer free access.

Free providers typically recover costs by showing ads or capping usage.

NetZero later added paid plans as broadband spread.

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