My wife is from Ukraine and arrived to the U.S. June 26th, 2022, we are married and recently had a baby, her parents are refugees in Germany. My wife has received her Greencard, I was wondering what is the best visa to bring her parents to the U.S. for a visit to meet their grandson? I know that they do not wish to stay in the U.S. and wish to return to Ukraine. Would a standard visitor visa be the best option? Any information or experiences in this would help.