Which of the following true statements, if added at the beginning of this paragraph would most effectively introduce readers to the information presented in the paragraph?

F. Good eyesight has always been an essential quality in a bomber pilot.
G. Men have always had their dreams of glory, and my grandfather was no different.
H. My grandfather joined the army soon after my mother was born.
J. My great-grandparents were pacifists, but that hadn’t stopped my grandfather from enlisting.