Taking the context clues into consideration we can say that "onerous" most likely means "burdensome," as expressed in option 3 and further explained below.
What are context clues?
We can say context clues are pieces of information we find in a text that reveal the meaning of a word we do not know. Here, we are looking for the meaning of "onerous" in the excerpt.
Since the speaker was already tired after a tough day at work, cleaning the kitchen is certainly not perceived by him or her as something pleasant. Therefore, we must select the option that expresses the opposite of pleasant.
That is why option 3 is correct. "Burdensome" means difficult or tiring, and it makes sense when we take the context into consideration.
Learn more about context clues here:
https://brainly.com/question/2437273
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