自己办H1B TRANSFER

新公司需要提供什么资料？在添I129时，这几个选项应选哪一个：1)New employment 2)Continuation of previously approved employment without change 3)Change in previously approved employment 4)New concureent employment. 有人告诉我说选3，但我觉着因为是换成新雇主了，应选1。请明白人指点。多谢了。