Read the paragraph. Al and his father decided to make mayonnaise. Al wasn't sure he'd like a treat, so off they went. They gathered the ingredients they'd need: oil, egg yolks, watched as his father liquefied the yolks . Then Al watched him drizzle the oil very thicken. Al's father flicked in some salt and pepper and the mustard and, presto, mayonnaise in the jar,"he said. Which ingredient did Al's father put in the blender first? 1. salt 2. oil 3. pepper 4. egg yolks