The correct answer is "nice". The impact of this word in this sentence is weak as the reader does not focus on the benefits of fresh vegetables and select cuts of meat.
The word "nice" means pleasant or satisfactory but does not have a great impact in the sentence.
Another synonym that could be used to generate a positive and strong statement is "marvellous" which means sensational, extraordinary, extremely good.
In this case, the sentence would be: "Our farm-fresh vegetables and select cuts of meat taste marvellous."