What is the name of the Spanish mystic and Carmelite nun, a Doctor of the Church, who wrote 'The Interior Castle' and reformed the Carmelite order in the 16th century?

• A Saint Teresa of Avila ✓
• B Saint John of the Cross
• C Saint Isidore of Seville
• D Saint Rose of Lima

Teresa of Avila, a mystic and reformer, was the first woman named a Doctor of the Church, honoured for her profound writings on contemplative prayer.