Answer: Swiss chocolate will become more expensive in the United States.
Step-by-step explanation:
If the American dollar depreciates relative to the Swiss Franc then Swiss chocolate will become more expensive in the US.
This is because goods belonging to the country with the stronger currency will be more expensive in the country with the weaker currency.
For example, let's say the rate of USD to Franc was 1:1 and swiss chocolates cost Fr5 that means it would cost $5 as well in the US.
Now suppose the rates become, USD to Franc, 1.25:1 meaning the Franc is stronger now. The price of chocolate in Switzerland is still Fr.5 but now in the US it will go to,
= 5 * 1.25
= $6.25 meaning Swiss things are now more expensive in the States.
NB - Your third option says, "American computers will become less expensive in Italy". If this was a typo and you meant, "in Switzerland" then this option is CORRECT as well because American goods will be cheaper in Switzerland.
Cheers.