exception question,why?

[jason rex]

Imagine that there are two exception classes called Exception1 and Exception2 that descend from the Exception class. Given these two class definitions,
1. class First {
2. void test() throws Exception1, Exception2 { . . . }
3. }
4. class Second extends First {
5. void test() { . . . }
Create a class called Third that extends Second and defines a test() method. What exceptions can Third's test method throw? Select one valid answer.
a Exception1
b Exception2
c no checked exceptions
d any exceptions declared in the throws clause of the Third's test() method

I am confused why the answer is c .

[vinay jain]

Because C's base class i.e. B does not throw any exceptions so you can't throw any exception from class C.

[jason rex]

thanks
I finally see no checked exception is decreasing the scope of exceptions which are exception1 and exception2

[Darryl Failla]

The checked exceptions available for throwing in a child class overriding method must be a subset of the checked exceptions thrown in its parent class overridden method. In this example, First is the parent of Second, so test() in Second can throw Exception1, Exception2, none, or both.
Second is the parent of Third. Since test() in Second throws no exceptions, test() in Third is not eligible to throw any checked exceptions.