Read this example of dialect from "Everyday Use."

.. I been saving 'em for long enough with nobody using 'em."
Which of these sentences most accurately restates the example in formal English?
O a I am keeping them safe for a long enough time so that nobody harms them."
О b " I have been saving them for a long enough time with nobody using them."
O c 'I've been saving this here stuff for long enough without nobody using it."
O d " have been saving him for a long time from situations in which other people take advantage of him."

b "I have been saving them for a long enough time with nobody using them."