The salesperson for BM&M, a company manufacturing automated sawdust screens, was giving a presentation to a buying agent. During the presentation, the salesperson handed the buyer a letter from a pallet manufacturer in Georgia. The letter praised the efficiency of the BM&M screen and was especially complementary of the fact that the screen only has six moving parts. This letter is an example of a(n) _____.
A. demonstration
B. proposition
C. illustration
D. attestation
E. testimonial

Testimonial tends to consist of an individuals written or spoken the proclamation acclaiming the integrity of the commodity. The terminology most commonly refers to sales-pitches that tends to be associated to the ordinary individual, whereas terminology endorsement tends to be applied to the pitches done by celebrities.

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