The iPhone $11$ came with the added feature of a dual camera. Many consumers are interested in this product because of the cool image attached to the Apple brand, but because they also consider themselves to be amateur photographers and see the second camera lens as a feature that will enhance the quality of the pictures they create. Which of the following is an example of the iPhone$$s tangible feature?

a$.$ second camera lens

b$.$ competitors

c$.$ image

d$.$ brand equity