Which of the following best describes a total return swap?

It exchanges the promised return on an asset, including income but not capital gains/losses, for a return equal to LIBOR plus a spread on the initial value of the asset

It exchanges the realized return on an asset, including both income and capital gains/losses, for a return, equal to LIBOR plus a spread on the initial value of the asset

It exchanges the realized return on an asset, including income but not capital gains/losses, for a return equal to LIBOR plus a spread on the initial value of the asset

It exchanges the promised return on an asset, including both income and capital gains/losses, for a return equal to LIBOR plus a spread on the initial value of the asset