I Collected Some Data About How Much Buyers of My

I collected some data about how much buyers of my book liked it (on a scale of 1 = it's utter rubbish to 10 = I never read anything else) . I ended up with a sample of 15,467 people. When I looked at the distribution, I found a skew of 1.23 (SE = 0.65) . The mean rating was 4.78. What is the z-score for the skew of my data?

A) 1.89
B) 0.53
C) -3.92
D) 3.36