The correct option is A 40
The given sequence is 8, 16, 24, 32.
Let us find the difference between the terms.
Difference between the 1st and the 2nd terms = 16 - 8 = 8
Difference between the 2nd and the 3rd terms = 24 - 16 =8
Therefore, to find the next term, we have to add 8 to each term.
Hence, the pattern is 8, 16, 24, 32, 40.
After 5 hours, she would have sent 40 mails.