Which sentence does not contain any errors in comma usage?

a. it is raining today, so we need our umbrellas.

b. i want to go swimming but, the pool has already closed for the day.

c. several flowers have bloomed in the garden and more will surely bloom this week.

d. i might wear this black dress or i might wear the red dress.

Read the passage: canines may not be the deepest thinkers in the world. but perhaps that's for the best. the life of a dog—sitting alone all day, waiting for everyone to come home—can be pretty boring. super-smart animals would probably get totally stressed out, says university of pennsylvania researcher james serpell. look at it this way: if dogs were any smarter, they probably wouldn't choose to hang around with us. which best describes the tone of the passage?

The speaker in the “to a mouse” regrets that the mouse runs away so fast because the

Which statement best paraphrases these sentences from the text