The quote means care for others and not just yourself. Basically, don't be selfish and help other people when you can.
Answer:
I believe your answer is: B. If Tom goes sailing, then Tonya will go surfing. If Tonya goes surfing, then she will catch a cold. So, if Tom did not go sailing. Tonya will not catch a cold.
Explanation:
If Tom = sailing means Tonya = surfing and if Tonya = surfing means Tonya gets a cold, then if Tom does not go sailing then Tonya will not go surfing and get a cold.
Hope this helps.
Although many of these answers could be correct, I would argue that B is the most correct one?
In the rest of the play, Macbeth is often portrayed as a coward, often unwilling to go through with a plan. His sudden display of bravery is very new, perhaps driven by his insanity.