B) is true.
My maternal grandfather, then a bachelor aged 17, entered through Ellis Island in 1910. *He began working and saving money to send for the love of his life.
My paternal grandparents, then a married couple both aged 25, entered with two children through Ellis Island in 1912.
My maternal grandmother, then a spinster aged 21, entered through Ellis Island in 1914. (*He had saved enough by then to send for her. I have always found it remarkable that 1) he didn't shack up with a woman he met in NYC, and 2) she wasn't forced to marry a man of her father's choice back in the town where they both grew up. A true romance.)
Edge will guess next.