Answer:
B. Gross profit decreased from 28.6% to 26.5%
Step-by-step explanation:
As for the provided information, we have
Particulars Year 2016 Year 2015
Sales $38,537 $47,011
Cost of goods sold $28,309 $33,546
Gross Profit $10,228 $13,465
Gross profit as a percentage of sales shall be:
Year 2016 =

Year 2015 =

As the percentage is higher of 2015 by 0.1%
The statement B which states that the gross profit has reduced is correct.