某電影院中有五個朋友坐在五個位置一起的座位上 ,這五個座位由左至右編號從$$1$$到5（此處的左和右是他們坐好時，從觀察者面對他們的觀點而言）．在電影播放时，甲去大厅买爆米花，當她回來時發現「乙」向右挪了兩個位子，「丙」向左移了一个位置;且「丁」與「戊」交換了座位，而將最旁邊的位子留给了甲，試問「甲」在去買爆米花前原來坐在幾號的位子上?  Five friends sat in a movie theater in a row containing o seats, nunbered I to 5 from left to right. (The directions "left" and "right" are from the point of view of the people as they sit in the seats.) During the movie Ada went to the lobby to get some popcorn. When she returned, she found that Bea had noved two seats to the right, Ceci had moved one seat to the left, and Dee and fdie had switched seats, leaving an end seat for Ada. In which seat had Ada been sitting before she got up?
选项为:A:$$1$$  B:$$2$$  C:$$3$$  D:$$4$$  E:$$5$$  请回答其中一个选项.