Correct Answer: BACD

Solution : The correct choice is the second option : BACD.

The logical flow of information is:

• Sentence B: Introduces the location, the Palau Nacional, on the hill of Montjuïc in Barcelona.
• Sentence A: Provides additional information about the building by mentioning its designers, Eugenio Cendoya and Enric Catà, and the year of its design, 1929.
• Sentence C: Informs about the transformation of the Palau Nacional into a National Museum in 1990.
• Sentence D: concludes by stating that since 1934, the building has been serving as the Art Museum of Catalonia.

So, the complete paragraph would be: The Palau Nacional is a building on the hill of Montjuïc in Barcelona. It was designed by Eugenio Cendoya and Enric Catà in 1929. It was declared a national museum in 1990. Since 1934, it has been home to the Art Museum of Catalonia.