The difference between a checked and an unchecked exception is:
a) checked exceptions need not be listed in a throws clause
b) unchecked exceptions must be listed in a throws clause
c) neither kind of exception follows the rules of exception propagation
d) an unchecked exception requires no throws clause
e) a checked exception always must be caught by a try block; an unchecked exception does not

(d) an unchecked exception requires no throws clause

Explanation:

A checked exception requires a throws clause whereas an unchecked exception does not require a throws clause.

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