Exam AD01 topic 1 question 62 discussion

Examine the process flow:

The Process is intended to attempt to perform the processing in the recover block, Block 3, a maximum of three times before throwing an exception.
Data Item "Attempts" is a number data item with an initial value of 0
Data Item "Max Attempts" is a number data item with an initial value of 3
The "˜Increment Attempts' calculation stage outputs a result to the "Attempts" data item
To enable this to work correctly, what is the correct expressions for the "˜Increment Attempts' calculation stage?