Answer:
C. unpleasant
Step-by-step explanation:
The word "odious" resembles the word "unpleasant" in meaning, as it refers to something that inspires hate. However, if you do not know the meaning of a word, it is always a good strategy to look at the context of the sentence. In this sentence, we learn that "odious" refers to heavy housework, and in particular actions such as washing linen, carrying slops and water. All of these are likely to be unpleasant activities.