What would be the best way to learn the cases in german?

15 can someone translate this paragraph to german? (i created all and the incident went so complicated so most of them might not be senseful but the only important thing is translating not harmony of the text.)

Wich of the following this an unbiased way to ask a question about possible vacation destinations? a.) would you like to go to rainy london? b.) would you like to go to windy chicago? c.) would you like to go to sunny miami? d.) would you like to go to los angeles?

How many members are there in the house of representatives