German A1 Level Question

Option a is correct: 'Ich möchte ein Buch kaufen.' means 'I want to buy a book.' Option b is incorrect because 'kaufen' should be in the past tense ('kauften' or 'haben gekauft'). Option c is incorrect because it lacks context for what music is being bought. Option d incorrectly uses 'kaufen' to suggest going to the cinema, which should be 'gehen'.