The answer option that contains no errors in capitalization is:
A) "Too much rest itself," according to Homer, "Becomes a pain."
Explanation:
Capitalization:
Capitalization are the rules in English grammar and many of us do the simple capitalization errors in our writings. Some capitalization rules are:
Capitalize the first letter of word at the beginning of a sentence. Like She is going to school.
Use the capital letter for words that are the proper nouns and for names like Jack is a good boy (Jack is proper noun)
In our case the the option A is correct as it follows the capitalization rule as the first word starts with T capitalization then Homer (proper noun) and then the first word of quotes also starts with the capital letter "Becomes" .
The option B has capitalization error that the first word in quote is not starting with capital letter like "is not to be denied."
Similarly the capitalization error occur in quote as the first word is not starting with capital letter "perform without fail what you resolve."
The author uses the word "metamorphosis" to describe the "four-stage process of change." They are introducing new vocabulary terms in a friendly context. They also may have included it because it's the most accurate scientific term for the process of growth undergone by the beetle.