Answer:
D
Explanation:
you need a better pic if possible, it's kinda hard to read the question.
350 kHz
as there are 100,000 character per sec.
so, total number of bits per sec = 100,000 * n
= 100,000 * 7 = 700,000 bits per sec
= 700 kbps
Bandwidth (BW) = total no. of bits / 2
BW = 700 kbps/2
= 350 kHz