Which sentence uses the superlative form of an adverb?
a. of all the boats on the lake, the swan boat moved most slowly.
b. little crabs scurried quickly over the sand.
c. my cousin's boat sailed closer to the sandbar than my boat.
d. i always like to visit my grandmother.

Read the excerpt from the dark game: true spy stories from invisible ink to cia moles. yet, by the time robert e. lee surrendered to ulysses grant at appomattox, virginia, some four years later, about 620,000 soldiers had died on the battlefields, more than american battle deaths in all other wars from the revolution through the vietnam war. what is the author’s primary purpose for including this detail? to inform readers about the differences between three military conflicts to persuade readers of the seriousness of the american civil war to entertain readers with tales from behind the lines of battle to encourage readers to visit battlegrounds in appomattox, virginia