In which sentence from the passage does the writer use an idiom?
“Not that my grandmother is a dinosaur, mind you.” (paragraph 1)
“But my grandmother's transaction made it clear: online shopping has become as commonplace as brushing your teeth.” (paragraph 2)
“And last but not least, who would buy something without seeing it first?” (paragraph 2)
“Buying a car, a major appliance, or fine jewelry online raises a lot of red flags for me.” (paragraph 7)
