Read "loveliest of trees, the cherry now" by a.e. housman:

which excerpt from the poem best conveys the theme that we should make the most of every day because our lives go by so quickly

a. loveliest of trees, the cherry now / is hung with bloom along the bough

b. and stands about the woodland ride /wearing white for eastertide

c. about the woodlands i will go / to see the cherry hung with snow

d. now, of my three score years and ten / twenty will not come again

C). Children dance.

Explanation:

As per the question, the statement that offers a subject and a verb in the agreement is displayed through option C "Children dance" as it correctly follows the subject-verb agreement rule and employs a plural verb 'dance' with the plural subject.  

The other options deny this rule as option A falsely employs 'dances'(the verb for third-person singular) instead of 'dance' with 'I' while option B uses singular verb 'dances' instead of 'dance' with the plural subject 'you'. Option D too carries the same error and should be 'you do dance' or 'you dance'. Thus, option C demonstrates the correct answer.