Which of the following sentences contains parallelism? a) we sold two bikes at the garage sale and we sold four chairs as well as receiving offers for three lamps. b) i prefer new things but some people like to buy things other people have owned. c) a garage sale can begin in the morning or it can be an afternoon sale. d) at the garage sale we sold old used and unwanted items.

It's D, since both have ed's, while other sentences combine ed's and ing's. They have to have the same ending. I hope this helps!

Syllable added to a root word to change its meaning : affixan independent word--example run,walk,book : free morphemeaffix that gives grammatical meaning such as tense or number : inflectiona word part that must attach to a word in order to be usable : bound morphemedegree of comparison formed by adding -er or more to an adjective : comparativedegree of comparison formed by adding -est or most to an adjective : superlativeaffix added to the beginning of a word : prefixaffix added to the end of a word : suffixroot word of lovable : lovetwo roots used together to form one word : combining form