Which one among the following is the correct answer for an increase in autonomous spending leading to an even greater increase in equilibrium level of output

$•⁠⁠$as firms increase output to meet demand, income increases, and this induces more consumption spending

$•⁠⁠$the multiplier increases with an increase in autonomous spending

$•⁠⁠$prices rise with increased output and this raises nominal GDP

$•⁠⁠$people save less as their income increases