______ (walk) along Fifth Avenue for a while, they decided to have dinner at Rockfeller Centre.

A．death rates are connected with ozone levels
B．ozone is made up of two parts
C．lung cancers are connected with ozone levels
D．the environment goes worse and worse in American

A．Sorry, I am in a hurry.
B．How could I possibly know
C．Ask others, will you please
D．Sorry, I’m also a stranger her