Which sentence does not contain any errors in comma usage?

a.
it is, a hexagonal, traffic sign.

b.
jeremy has an old red wagon.

c.
the antique, and enormous clock stands in our living room.

d.
the stereo was designed with four, large speakers.

Tell the story of a romantic couple you know use reciprocal reflexive forms of verbs to tell what happened between them and when. use stressed possessive adjectives and pronouns as needed to talk about their families and their difficulties. use familiar commands to give examples of advice you give to each member of the couple on important issues.