How many babies can a goat give birth to?

I'm curious to know, what is the average number of babies a goat can give birth to at one time? Is it possible for a goat to give birth to more than one baby simultaneously? And if so, what factors might influence the number of offspring a goat has? Is there a specific breed of goat known for producing larger litters? Lastly, is there a maximum number of babies a goat can safely deliver in a single birth?