A copywriter is deciding on the best approach for a social media ad featuring a beauty cream and has narrowed down her options to two typestestimonial or dialogue. Which of the following is a major difference between a testimonial and a dialogue?

a$.$ A testimonial approach is written by the spokesperson, while a dialogue approach is written by the copywriter.

b$.$ A testimonial approach uses the hard$-$sell method to push the product, while a dialogue approach uses the image method to create a social setting.

c$.$ A testimonial approach is one$-$sided, while a dialogue approach has two people conversing.

d$.$ A testimonial approach emphasizes product benefits, while a dialogue approach emphasizes image.