Which of the following strategies leads to an effective sales presentation?

Which of the following strategies leads to an effective sales presentation?

a. Giving equal importance to all the attributes irrespective of their importance weights

b. Altering the buyer's beliefs about the proposed offerings when the buyer underestimates the product

c. Avoiding calling attention to neglected attributes

d. Refraining from altering the buyer's beliefs about the competitor's offerings even when the buyer overestimates the competitor's product

e. Retaining the product offering being proposed even if it is different from buyer's needs