Hmmm. i think it is D. but thats just my opinion <span />
Hey there!
<span>Read
the spelling pattern rule. Nouns that end in a consonant + y are made
plural by adding -ies. some examples are babies, ponies and spies. Which
does not follow the pattern rule?
Answer: C. pencils
Hope this helps
Have a great day (:
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The subordinate clause is "unprotected animals got swept out" and the main clause is because "when waves rush in". hope u get it right ;)