What did President Kennedy mean when he said, “ Let every other nation know that this hemisphere is the master of his own house?”

the anwser is a) to prevent military conflict

i am pretty sure it is a

the romans were initially interested in expansion via sicily (which at that time was a cultural melting pot), part of which lay under carthaginian control. at the start of the first punic war (264-241 bc), carthage was the dominant power of the western mediterranean, with an extensive maritime empire