Which sentence contains a misplaced or dangling modifier?

a.
birds migrating from the north to the south flew overhead.

b.
easing up on the throttle, the boy guided the boat to the dock.

c.
to check out the book yourself, just scan the barcode.

d.
on hearing news of the storm, the school was closed.

The speech president kennedy's report to the american people uses logos, ethos, and pathos, which are

You suspect that this article has left out some facts that might lead the reader to believe that someone else made the star-spangled banner. what is the best way to verify this? by consulting a variety of sources by disregarding the article entirely by writing a letter to the editor of the publication that printed the article by reading various historical accounts by verifying the opinions

Changing the sentence structure and how quickly events unfold in a story can affect which literally element?