The correct option is A The Battle of Lincoln 1141
In 1139, Matilda crossed to England to take the kingdom by force, supported by her half-brother Robert of Gloucester and her uncle King David I of Scotland, while Geoffrey focused on conquering Normandy. Matilda's forces captured Stephen of Blois at the Battle of Lincoln in 1141, but the Empress' attempt to be crowned at Westminster collapsed in the face of bitter opposition from the London crowds. Hence, Option A is correct.