The Management Discussion and Analysis (MD&A) section of the annual report is on pages 24-36. In this section, Smucker's management provides its explanation of the company's financial results. On page 25, management provides a summary of the financial results for 2017 and 2016. According to company management, what is the main reason for the decrease in net sales for 2017?

MD&A explanation for the year 2017 :

Net sales decreased 5 percent in 2017, driven by the noncomparable impact from the U.S. canned milk business, which was divested during the third quarter of 2016, as well as lower net price realization and unfavorable volume/mix in the current year. Operating income decreased 10 percent, primarily due to the impact of noncash impairment charges of $133.2 recognized during 2017 and the net sales decline. For additional information on the impairment charges, see Note 7: Goodwill and Other Intangible Assets. Additionally, prior year results benefited from the recognition of a $25.3 pre-tax gain on the divestiture of the U.S. canned milk business and the related profits prior to the divestiture. Selling, distribution, and administrative (SD&A) expenses and merger and integration costs were lower in 2017 as compared to 2016. Operating income excluding non-GAAP adjustments (adjusted operating income) decreased 1 percent in 2017 and excluded the impact of the impairment charges and the reduction in merger and integration costs. Net income per diluted share decreased 11 percent in 2017, while adjusted earnings per share decreased 1 percent. Both 2017 per share measures reflect the benefit of a decrease in weighted-average common shares outstanding as a result of our share repurchase activities during the fourth quarters of 2017 and 2016. However, this benefit was more than offset by the impact of an increase in the effective tax rate in 2017 as compared to the prior year.