My answers:
1.The reasons for your request
because they have multiple entries visa, and that visa is still valid for another 6 months. That is to say, even if you denied them this time, they can still go out of this country and enter again, perfectly legal. Why don't you save me and you this trouble?
2. Why your extended stay would be temporary,
including what arrangements you have made to
depart from the United States; and
Same, because the visa will expire after 6 months, they will lawfully leave when it expires.
3. any effect the extended stay may have on
they will stay longer here, presumably spending more money here.
1.The reasons for your request
because they have multiple entries visa, and that visa is still valid for another 6 months. That is to say, even if you denied them this time, they can still go out of this country and enter again, perfectly legal. Why don't you save me and you this trouble?
2. Why your extended stay would be temporary,
including what arrangements you have made to
depart from the United States; and
Same, because the visa will expire after 6 months, they will lawfully leave when it expires.
3. any effect the extended stay may have on
they will stay longer here, presumably spending more money here.