What's true about closures?

A closure is a type of functionClosures can detect their parameter typesClosures can detect their return typeClosures always require a parameter list

Great! Closures are types of functions, can detect their parameter and return types and don't need a parameter list, as they have shorthand parameter names.

Yikes! Closures are types of functions, can detect their parameter and return types and don't need a parameter list, as they have shorthand parameter names.