Correct punctuation for “the first microwave ovens were sold in 1960’s, but, everybody didn’t use them until the late 1980’s”

Which word or phrase would smooth the transition between sentence 1 and sentence 2? o "in conclusion" o "for example" o "therefore" o"because"

What happened after gandhi’s quit india speech?

Which of the following statements would most encourage productive conflict? select all that apply.