Which sentence does not contain any errors in comma usage? a. the table was delivered in two, cardboard boxes. b. sally has a new blue bedspread. c. it is, an octagonal, wooden table. d. the old, and dusty table had cracked broken legs.

The correct answer is B. Sally has a new blue bedspread.

Why not the other ones?
A. The table was delivered in two, cardboard boxes. - this sentence should not have a coma between 'two' and 'cardboard'
C. It is, an octagonal, wooden table. - we don't put a comma after verb - in this case after 'is'
D. The old, and dusty table had cracked broken legs. - there is no need to put a comma before a conjunction word (i this case - and)