Answer:
Drinking coffee is good for you. Two recent studies have shown that coffee drinkers live longer.
Students should use e-books. Many suffer from back trouble from carrying so many books in their backpacks.
Step-by-step explanation:
Both claims are supported by closely connected or appropriate testimony. The first assertion is reinforced by mentioning recent studies that confirm that coffee drinkers have a longer life expentancy.
As regards the e-books demand, the suggestion is justified with information about students' back problems.