Final answer:
After evaluating the options, the correct answer is that Lucia swam 8 laps, since this is the only choice where Lucia has swum more laps than Dan, who swam 7 laps.
Step-by-step explanation:
The question suggests that Lucia swam a few laps more than Dan. Dan swam 7 laps. If Lucia swam more than Dan, then option a) Lucia swam 5 laps cannot be correct because 5 is less than 7. Similarly, option d) Lucia swam 7 laps also cannot be correct because this indicates that she swam the same number, not more. Option c) Lucia swam 6 laps is also incorrect for the same reason as option a), since 6 is also less than 7. Therefore, by process of elimination, the correct answer is option b) Lucia swam 8 laps, as this is the only option where Lucia swam a number of laps greater than Dan's 7.