30 POINTS AND BRAINLIEST IF CORRECT Select the correct answer from each drop-down menu.
Complete each sentence with the best transition word or phrase.

The Invention of the Washing Machine
In the past, people used sticks and stones or scrub boards to clean their clothing. It was sweaty, backbreaking work. [Therefore,; Of course,; It's no wonder,; To sum up,] we owe a world of thanks to James King. He created the model for the modern washing machine in 1851. This machine cleaned clothes while a person cranked the handle. People who used it developed strong muscles in their arms from turning the handle. [Yet,; For,; So,; Then,] in 1908, Alva J. Fisher created an electric washing machine named Thor. Thor was not the first automatic washing machine. However, it was one of the most popular models at the time.

Explanation:

1. It's no wonder

All of the other words sound odd with this sentence. Therefore sounds almost correct but it doesnt make sense.

2. Then

its the only word that makes sense

It’s no wonder and So

Explanation:

If you used any of the other transition words the sentence would sound like it was written by a child.

it was surely an odd creature that one made up by reading the historians first and the poets afterwards a worm winged like an eagle; the spirit of life and elegance and charm,   in a kitchen chopping up suet. but these creatures, monst'r however entertaining to the imagination, hast no existence in fact. what one might doth to bringeth h'r to life wast to bethink poetically and prosaically at one and the same moment,   thus keeping in toucheth with fact—that the lady is mrs martin, ag'd thirty-six, did dress in blue, wearing a black coxcomb and brown shoeth; but not losing sight of fiction eith'r—that the lady is a vessel in which all s'rts of spirits and f'rces art coursing and flashing p'rpetually. the moment, howev'r, yond one tries this method with the elizabethan mistress, one brancheth of illumination fails; one is did hold up by the scarcity of facts.   one knoweth nothing detailed, nothing p'rfectly true and substantial about h'r.   hist'ry scarcely mentions h'r.   and i did turn to professeth'r trevelyan again to seeth what hist'ry meanteth to that gent.   i hath found by looking at his chapt'r headings yond t meanteth.

the answer is b. i read this story before.