I forgot your address. I can't remember __________ to your house.[ ]

A. how get

B. how can I

C. how to get

D. how getting

甲签发一张汇票给乙，乙为限制行为能力人，但乙将该票据背书转让给丙，丙是善意的且给付了对价，丙又背书将该汇票背书给丁。丁请求付款时，付款人可以票据无效为由拒绝付款。( )