Argument: 'Anil's stall was open last Sunday. So the market's weekend fee was paid for that day.' Which of the following, if true, would make this argument valid?

The argument moves from 'the stall was open' to 'the fee was paid', so it needs a rule carrying open stalls to paid fees without exception. The first option is that rule. The second runs from payment to permission, which is the reverse; 'most' leaves room for Anil's stall to be an exception; and what Anil did on earlier Sundays settles nothing about this one.