Answer:
a.42.5%
Step-by-step explanation:
Net profit margin = net income/total sales revenue.
According to the values in the question, the net income is $1,850, while the total sales revenue is $4,350.
The net profit margin is thus: 1850/4350 = 0.425
0.425 times 100% = 42.5%
So, the answer is A