. Which of the following activities might not meet the "minimum contacts" requirement sufficient to obtain personal jurisdiction over an out-of-state defendant under the authority of a state 'long arm' statute

a.the defendant placed its goods into the 'stream of commerce' with the intent that the goods be sold in the state.

b.the defendant maintains a branch office in the state.

c.the defendant, based in another country, engages in advertising on the internet that is occasionally viewed by residents of the state.

d.the defendant made a single sale to a customer in the state.