Albert Has Created a New Technology That He Wants to Patent.Which

Albert has created a new technology that he wants to patent.Which of the following disclosures, done before filing a patent application, would not prevent his patent application from being successful?

A) Albert telling his friend Einstein about the new technology over coffee.
B) Albert giving out samples of the new technology at a 'tech-fair' to measure public response to his technology.
C) Albert showing the technology to several banks while seeking finance to market his new technology.
D) Albert consulting a patent attorney for advice.