B. The punctuation belongs outside of the parenthetical citation.
Cob has been used since the 17th century as a building material. It is made by mixing dry sand, sifted clay and water. A cob house is a house that is made from this material. A benefit of using this material, is that it is sustainable and only uses natural products.
Answer:
<u>Common Error: </u>Grammatical errors come in many forms and can easily confuse and obscure meaning. Some common errors are with prepositions most importantly, subject verb agreement, tenses, punctuation, spelling and other parts of speech. Prepositions are tricky, confusing and significant in sentence construction.
<u>Deviant Usage: </u> Someone or something that deviates from a norm especially : a person who differs markedly (as in social adjustment or behavior) from what is considered normal or acceptable social/moral/sexual deviants Those who commit crimes also watch TV, go to the grocery store, and have their hair cut.
I think that number 3 is the answer you're looking for.
