The vertical analysis statement of? Peterson, Inc. is as shown? below:

? Peterson, Inc.

Comparative Income Statement

Years Ended December? 31, 2017 and 2016

?(In millions)	2017	Percent of Total	2016	Percent of Total
Net Sales	?$6,355	?100.0%	?$4,920	?100.0%
Cost of Goods Sold	?3,370	53.0	?2,200	44.7
Gross Profit	?2,985	47.0	?2,720	55.3
Operating? Expenses:
Selling Expenses	675	10.6	580	11.8
Administrative expenses	410	6.5	425	8.6
Total Operating Expenses	?1,085	17.1	?1,005	20.4
Operating Income	?1,900	29.9	?1,715	34.9
Other Revenues and? (Expenses):
Interest Revenue	0	0	0	0.0
Interest Expense	?(400)	?(6.3)	?(695)	?(14.1)
Total Revenues and? (Expenses)	?(400)	?(6.3)	?(695)	?(14.1)
Income Before Income Taxes	?1,500	23.6	?1,020	20.7
Income Tax Expense	230	3.6	210	4.3
Net Income	?$1,270	?20.0%	?$810	?16.5%

The? 20% shown for net income in 2017 signifies that net income? ________.??

A.equals 20 times of the income before income tax

B.is? 20% of net sales revenues

C.is? 20% of gross profit

D.increased by? 20% over the previous year