Thursday: 2 choices {museum, park}
Friday: 4 choices {shopping, jet ski, hiking, and the choice not chosen for Thu}
Saturday: 1 choice {food}
Sunday: 3 choices {the remaining 3 after Friday's choice}
The total number of ways these choices can be arranged is 2×4×1×3 = 24
The apprpropriate selection is A) 24.