Why did the early attempts at sleep teaching fail? how did they improve it

Which sentence best summarizes this excerpt from book 21 of the odyssey?

Tell the story of a romantic couple you know use reciprocal reflexive forms of verbs to tell what happened between them and when. use stressed possessive adjectives and pronouns as needed to talk about their families and their difficulties. use familiar commands to give examples of advice you give to each member of the couple on important issues.

Which sentence is punctuated correctly? the shoes normally cost 40 dollars, however; we got them on sale. the shoes normally cost 40 dollars however we got them on sale. the shoes normally cost 40 dollars, however, we got them on sale. the shoes normally cost 40 dollars; however, we got them on sale.