Which of the following describes a handle (as applicable to LR-parsing) appropriately?
(A)
It is the position in a sentential form where the next shift or reduce operation will occur
(B)
It is non-terminal whose production will be used for reduction in the next step
(C)
It is a production that may be used for reduction in a future step along with a position in the sentential form where the next shift or reduce operation will occur
(D)
It is the production p that will be used for reduction in the next step along with a position in the sentential form where the right hand side of the production may be found
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