Answer :
it s option 'A'
the people along the curb are smiling and waving
the people along the curb are smiling and waving
The answer to your question would be that the choice that shows the sentence rewritten using normal subject-verb order is the following one: The people along the curb are smiling and waving.
The revision of the sentence shows canonical order, that is, the subject precedes the verb. On the contrary, the original sentence is an example of a postverbal subject.