Q. How do you add a background color for all <h1> elements? (A) all.h1 {background-color:#FFFFFF} (B) h1.all {background-color:#FFFFFF} (C) h1 {background-color:#FFFFFF} (D) None of these 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (C) h1 {background-color:#FFFFFF}