求每个终点的平均票价的SQL语句是：A）SELECT终点，avg（票价）FROM ticket GROUP BY票价B）SELECT

求每个终点的平均票价的SQL语句是：A）SELECT终点，avg（票价）FROM ticket GROUP BY票价B）SELECT终点，avg（票价）FROM ticket ORDER BY票价C）SELECT终点，avg（票价）FROM ticket ORDER BY终点D）SELECT终点，avg（票价）FROM ticket GROUP BY终点