As part of his research on the Civil War, Charlie is reading a book about ironclads (a type of boat) and how they revolutionized naval warfare. Which of the following is most likely a lens he is exploring?

i confess that there are several parts of this constitution which i do not at present approve, but i am not sure i shall never approve them: for having lived long, i have experienced many instances of being obliged by better information or fuller consideration, to change opinions even on important subjects, which i once thought right, but found to be otherwise. it is therefore that the older i grow, the more apt i am to doubt my own judgment, and to pay more respect to the judgment of others.

after the roman empire, the catholic church began to unify by taking on many duties of a government.

assessment is the missing word