The number of t-shirts and shorts Dalton bought could be:
a- 6 t-shirts and 6 pairs of shorts
b- 7 t-shirts and 5 pairs of shorts.
e- 3 t-shirts and 2 pairs of shorts.
Dalton could have bought 6 t-shirts and 6 pairs of shorts (option a). This is because he could choose any of the 6 t-shirts and then any of the 6 pairs of shorts.
Dalton could have bought 7 t-shirts and 5 pairs of shorts (option b). This is because he could choose any of the 7 t-shirts and then any of the 5 pairs of shorts.
Dalton could have bought 3 t-shirts and 2 pairs of shorts (option e). This is because he could choose any of the 3 t-shirts and then any of the 2 pairs of shorts.
Dalton could not have bought 2 t-shirts and 1 pair of shorts (option c). This is because there are not enough t-shirts or shorts for this combination.
Dalton could not have bought 2 t-shirts and 0 pairs of shorts (option d). This is because he must buy at least one pair of shorts.
Therefore, the number of t-shirts and shorts Dalton bought could be 6 t-shirts and 6 pairs of shorts, 7 t-shirts and 5 pairs of shorts, or 3 t-shirts and 2 pairs of shorts.