Chaning from regular bulbs to () ones will reduce greenhouse gas by three-fourths. A: electric B: energy-saving

Paraphrasing techniques include: change vocabulary, change verb (active to passive); change word order... A: changing vocabulary, for example, by using synonyms B: changing verbs（动词）, for example, from active to passive to change the focus or emphasis; C: changing tense(时态）,for example, from past to present tense； D: chaning word class(词性）, for example, from verb to noun phrase