adicionando eventos a elementos criados por append

jquery append with events

$(document).on('click','.add-option',function(){
		
		$(this).removeClass('add-option btn-success').addClass('rm-option btn-danger').text('-');

		option_input = "<input type=\"text\"  class=\"options\" placeholder=\"Digite uma opção\" /><button class=\"add-option btn btn-success\" type=\"button\">+</button>";

		$('.option').append(option_input);

	}).on('click', '.rm-option', function(){
		$(this).prev().remove();
		$(this).remove();
	});