I am so exhausted I can barely type this . It 's Thursday evening at 7:30 p.m. I was up again all night last night and I did n't sleep one wink . This is the second night this week I have n't slept any .

Question with options to choose from: Why have they barely slept ?
1). They had been having problems falling asleep . 2). They had to stay up all night for school . 3). None of the above choices . 4). They had to stay up late for their job .
1).