Which sentence uses a verb that agrees with its subject?

a.
authors of books receives royalties for their work.

b.
the stripes on the american flag are white and red.

c.
the snails in the garden moves slowly.

d.
a bag of groceries were found outside the store.

A. to transition the reader smoothly from one idea or moment intime to the nextob. to grab readers' attention and get them interested in the essay'smain topicc. to provide more supporting details about the essay's main ideasor topicod. to sum up the overall point of the essay and make a lastingimpression