A. Wasn't.. This is because if you seperatevthe contractioninto two words it is was not, this would make the sentence be "Wally was not capable of lifting the heavy box."
If you were to do the same thing with weren't it would sound like "wally were not capable of lifting the heavy box." This does not make sense because "wally" is singular (so is "was not") and "were not" is pleural.
Hope this helps
Answer: In this passage, Lady Macbeth expresses her feeling that she and Macbeth have gotten what they wanted, to be king and queen of Scotland, but they are not truly happy. Macbeth is growing paranoid about retaining his power and status, and emotional distance is beginning to separate him and his wife when they had once been so close. They've "spent" all they had to become royalty, but now they are not content.
Explanation: please mark brainlyest i really need it