Answer :
Considering the situation described above, Sophia and Victoria's Mother would be willing to pay anything below $20.
There is a late fee of $5 per child for every 10 minutes the mother is late.
Also, given that the estimated time to be late is 20 minutes, that is $5 × 2 per child => $10.
And since there are two children involved (Sophia and Victoria), should the mother be late for 20 minutes, she would pay $10 × 2 (Child) => $20.
Hence, the mother would be willing to pay a toll road of anything less than $20 to get her to the daycare center on time. Otherwise, if the toll is more than $20, and she spent 20 minutes late, that's not economically wise.
Therefore, in this case, it is concluded that the correct answer is option B. "Any price less than $20."
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