The Following Sentences Form a Paragraph

The following sentences form a paragraph. For each set of choices, select the answer in which conjunctions or conjunctive adverbs are used correctly and that is punctuated correctly. Which sentence is correct?

A) When a Chinese official visited this country late in the nineteenth century, his American hosts asked him to cook a Chinese meal.
B) A Chinese official visited this country late in the nineteenth century, when his American hosts asked him to cook a Chinese meal.
C) A Chinese official visited this country late in the nineteenth century, consequently, his American hosts asked him to cook a Chinese meal.