Answer: It is relevant and sufficient, because she gives convincing examples of how phones support classwork.
Explanation:
Parvati's argument in favor of using cell phones in class is valid and sufficient. The evidence she presents is strong - she claims that cell phones are useful research tools that enable us to find the right piece of information. She also provides specific examples and even explains a situation in her class where cell phones were used. This makes her argument convincing, because she supports her claim with solid evidence.
On 26 March, the barber Ivan Yakovlevich finds out that his wife has made bread. During breakfast, he cuts a loaf in half and finds a nose in his bread. With horror, he recognizes this nose as that of one of his regular customers, Collegiate Assessor Kovalyov (known as 'Major Kovalyov').