Each guide was helpful, but we forgot to thank them.
You should use the plural pronoun, because we don't know whether the guides were only males, or females, or whether there were both sexes.
Answer:
A
Explanation:
The subject of the sentence is 'The slaughter' with 'of animals' providing more detail which is why the verb is singular.
After painting all day, Josh took a break to relax.
Answer:d
Explanation:I had this answer and got it right