Easy stuff help pleasei am on a test In which sentence are proper nouns correctly capitalized?

B. The Arecibo Observatory is on the island of Puerto Rico.
C. The telescope was designed by scientists from Cornell university.
D. A laboratory run by the U. S. air force assisted in the design of Arecibo.

Choose the sentence that is not logically connected in the paragraph. (1) it all happened late one night after the family had gone to bed. (2) jack was lying in bed when he remembered he had left the groceries on the back seat of the car. in the paper bag was a carton of ice cream. (3) the ice cream would melt during the warm summer night. (4) he put it in the refrigerator.