What is the name of the largest volcano in the Solar System?

To be in with a chance of winning, answer this question:

A: Olympus Mons (Mars) B: Mauna Loa (Earth) C: Maat Mons (Venus)

Competition ends on 10 September 2020

Enter online at spaceanswers.com or by post to

All About Space competitions, Quay House, The Ambury, Bath, BA1 1UA

Visit the website for full terms and conditions at futureplc.com/terms-conditions/