Which of the following WWII
advancements allowed planes to be
tracked during air raids?

which time period is this? or is this story fictional, i'm going to need more info to answer this question

i believe the correct answer is b.

a. men

and during later times male slaves as well

the lachish letters were written by hoshaiah, a military officer stationed possibly in mareshah,   and sent to yaush, possibly the commanding officer at lachish.

the series of letters were written in carbon ink in ancient hebrew on clay ostraca, shortly before lachish fell to the babylonian army of king nebuchadnezzar in 588/6 bc during the reign of zedekiah, king of judah.