A is the only one that ones not decrease using a negative sign
Answer:

<h2>33 is the right answer.</h2>
Answer 21
Step-by-step explanation:
It depends on where you live. I’d supposed you live in the United States. The average minimum wage for all of United States is $9.73 dollars.
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Series would be: 1,3,5......99
Here, a=1, d = 3-1 = 2, l = 99
l = a+(n-1)d
99 = 1+(n-1)2
98 = 2n-2
2n = 100
n = 50
Sum would be Sn = n/2 (a+l)
50/2 (1+99)
25(100) = 2500
So, your answer is 2500