Law 20F1 states: "during the auction and before the final pass, any player may request, but only at his own turn to call, an explanation of the opponents’ prior auction. He is entitled to know about calls actually made, about relevant alternative calls available that were not made, and about relevant inferences from the choice of action where these are matters of partnership understanding." Does this mean that: a. A player can ask about "calls actually made", "about relevant alternative calls available that were not made", and "about relevant inferences from the choice of action where these are matters of partnership understanding", or, b. A player can ask about "calls actually made" "where these are matters of partnership understanding", "about relevant alternative calls available that were not made" "where these are matters of partnership understanding", and "about relevant inferences from the choice of action" "where these are matters of partnership understanding"?