Which three words should have commas placed after them?

The 1893 World Columbian Exposition in Chicago which is remembered by many to this day launched an age of great fairs and expositions in the United States. The Chicago Exposition showcased technology and the fine arts and it illuminated what was to come in the era ahead.

Read these sentences from edgar allan poe's "the angel of the odd": it was a chilly november afternoon. i had just consummated an unusually hearty dinner, of which the dyspeptic truffe formed not the least important item, and was sitting alone in the dining-room with my feet upon the fender and at my elbow a small table which i had rolled up to the fire, … which element of this text suggests the events happened long ago? details about a fire descriptions of the furniture use of first-person narrator word choice and word order

Which line from “a simple way to create suspense” best supports the central idea that writers should not give their readers answers too quickly? a. the reader learns to chase, and the momentum becomes unstoppable. b. so writers are taught to focus on ingredients and their combination. c. we had to invent a solution to the serious problem it posed. d. thus the principle works in a micro sense, as well as in a macro one.

Which type of text structure focuses on what makes something happen and the consequences of that action?