Because they believed God was attacking their English enemy, the Scots foolishly planned to invade plague-stricken England.
Answer: Option A.
Step-by-step explanation:
This excerpt and the section has been taken from "The black death". This was written in the year 1348. The main and major focus of this was on the enmity of the Scottish people with people of England who were English people.
When the people in England were being killed by the problem of plague, the Scots people thought that the God was punishing their enemy, who were the people in England and taking an advantage of this they thought of invading England.