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B.
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E.
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Earlier discussion
1 older comment kept for context.
Oluwaseun Adeyemi
First of all, A in hexadecimal is 10 in decimal, B is 11, ... , and F is 15.
To convert hexadecimal to decimal manually, you must start by multiplying the hex number by 16. Which will be raised to a power that increases by 1 (the power at which the hexadecimal is raised starts at zero 0), by the hexadecimal number decimal equivalent. We start from the right of the hexadecimal number and go to the left when applying the powers. Each time you multiply a number by 16 the power of 16 increases. Hope this doesn't seem confusing.
When converting A0 hexadecimal to decimal your working should look something like this:
\(0 = 0 \times (16^0) = 0\)
\(A = 10 \times (16^1) = 160\)
We then add the results, we get 160 + 0 = 16010 in decimal.