Which of the Following Promotional Strategies Is the Best One

Which of the following promotional strategies is the best one for a company attempting to overcome the problem that services are intangible?

A) An advertising agency promises a surefire advertising campaign.
B) A software manufacturer creates software for new computer users who know what they want their . computers to do but don't know how to tell the computer.
C) A financial consulting firm specializes in female business owners.
D) A loan company informs its stockholders of the average number of loans it makes monthly.
E) A car repair center loans cars to those customers whose own vehicles will take longer than 24 hours to repair.