The following is a Turing machine that starts with the symbol # in one cell, where all other tape cells are blank. The beginning position of the tape head is not known. The machine halts with tape head pointing at the cell containing #. 0 is the start state. Tape actions in two instructions are missing. What should be the missing actions, in the same order of the instructions as they appear in the instruction sequence?

(0, #, #, S, halt)

(0, ?, X, L, 1)

(0, X, X, ___, 0)

(1, #, #, S, halt)

(1, ?, X, R, 0)

(1, X, X, ___, 1)

A. R, R

B. R, L.

C. L, R

D. L, L