Which is the best summary of this paragraph?
at bletchley park, thousands of people worked hard to
the british and allied troops during the wan
at bletchley park, the ten thousand people on the staff
figured out over six thousand codes, some of which were
very important to the war effort.
ten thousand people worked at bletchley park, but
some of the codes they solved were inconsequential to
the war effort
six thousand codes were figured out at bletchley park,
including some that had importance in regard to the war