Final answer:
The correct way to create a compound sentence from two independent clauses is by using a coordinating conjunction. Option D ('I love to buy presents for my family when I go on vacation, but I forgot to buy presents this time') is the correct answer.
Step-by-step explanation:
The correct way to create a compound sentence from two independent clauses is option D: I love to buy presents for my family when I go on vacation, but I forgot to buy presents this time. In a compound sentence, two independent clauses are joined by a coordinating conjunction, in this case, 'but'. The coordinating conjunction 'but' shows a contrast or opposition between the two ideas.